diff --git a/src/data/card.cpp b/src/data/card.cpp
index a85a5963..80f13d95 100644
--- a/src/data/card.cpp
+++ b/src/data/card.cpp
@@ -16,13 +16,11 @@ DECLARE_TYPEOF_COLLECTION(FieldP);
 
 // ----------------------------------------------------------------------------- : Card
 
-IMPLEMENT_DYNAMIC_ARG(Game*, game_for_new_cards, nullptr);
-
 Card::Card() {
-	if (!game_for_new_cards()) {
-		throw InternalError(_("game_for_new_cards not set"));
+	if (!game_for_reading()) {
+		throw InternalError(_("game_for_reading not set"));
 	}
-	data.init(game_for_new_cards()->card_fields);
+	data.init(game_for_reading()->card_fields);
 }
 
 Card::Card(const Game& game) {
diff --git a/src/data/card.hpp b/src/data/card.hpp
index b4671e61..765d357d 100644
--- a/src/data/card.hpp
+++ b/src/data/card.hpp
@@ -11,7 +11,6 @@
 
 #include <util/string.hpp>
 #include <util/reflect.hpp>
-#include <util/dynamic_arg.hpp>
 
 class Game;
 DECLARE_POINTER_TYPE(Field);
@@ -20,9 +19,6 @@ DECLARE_POINTER_TYPE(StyleSheet);
 
 // ----------------------------------------------------------------------------- : Card
 
-/// Game that is used for cards constructed with the default constructor
-DECLARE_DYNAMIC_ARG(Game*, game_for_new_cards);
-
 /// A card from a card Set
 class Card {
   public:
diff --git a/src/data/game.cpp b/src/data/game.cpp
index 63c60b21..7198dd9c 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -14,6 +14,8 @@
 
 // ----------------------------------------------------------------------------- : Game
 
+IMPLEMENT_DYNAMIC_ARG(Game*, game_for_reading, nullptr);
+
 GameP Game::byName(const String& name) {
 	return packages.open<Game>(name + _(".mse-game"));
 }
@@ -35,7 +37,6 @@ InputStreamP Game::openIconFile() {
 }
 
 IMPLEMENT_REFLECTION(Game) {
-//	ioMseVersion(io, fileName, fileVersion);
 	REFLECT(full_name);
 	REFLECT_N("icon",          icon_filename);
 	REFLECT(init_script);
diff --git a/src/data/game.hpp b/src/data/game.hpp
index 5b3c0022..bd56937b 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -12,15 +12,20 @@
 #include <util/prec.hpp>
 #include <util/io/package.hpp>
 #include <script/scriptable.hpp>
+#include <util/dynamic_arg.hpp>
 
 DECLARE_POINTER_TYPE(Field);
 DECLARE_POINTER_TYPE(Game);
 
 // ----------------------------------------------------------------------------- : Game
 
+/// Game that is used for cards constructed with the default constructor, as well as for reading stylesheets
+DECLARE_DYNAMIC_ARG(Game*, game_for_reading);
+
+/// A description of a card game
 class Game : public Packaged {
   public:
-	String full_name;				///< Name of this game for menus etc.
+	String full_name;				///< Name of this game, for menus etc.
 	String icon_filename;			///< Filename of icon to use in NewWindow
 	OptionalScript init_script;		///< Script of variables available to other scripts in this game
 	vector<FieldP> set_fields;		///< Fields for set information
diff --git a/src/data/set.cpp b/src/data/set.cpp
index a2068366..5fb2430a 100644
--- a/src/data/set.cpp
+++ b/src/data/set.cpp
@@ -29,13 +29,17 @@ Set::Set(const StyleSheetP& stylesheet)
 String Set::typeName() const { return _("set"); }
 
 IMPLEMENT_REFLECTION(Set) {
+	tag.addAlias(300, _("style"), _("stylesheet")); // < 0.3.0 used style instead of stylesheet
 	REFLECT(game);
-	if (data.empty() && game) {
-		data.init(game->set_fields);
-	}
-	REFLECT_N("set_info", data);
-	WITH_DYNAMIC_ARG(game_for_new_cards, game.get()) {
-		REFLECT(cards);
+	if (game) {
+		if (tag.reading()) {
+			data.init(game->set_fields);
+		}
+		WITH_DYNAMIC_ARG(game_for_reading, game.get()) {
+			REFLECT(stylesheet);
+			REFLECT_N("set_info", data);
+			REFLECT(cards);
+		}
 	}
 	REFLECT(apprentice_code);
 }
diff --git a/src/data/stylesheet.cpp b/src/data/stylesheet.cpp
index 4d28c229..a516a828 100644
--- a/src/data/stylesheet.cpp
+++ b/src/data/stylesheet.cpp
@@ -7,8 +7,70 @@
 // ----------------------------------------------------------------------------- : Includes
 
 #include <data/stylesheet.hpp>
+#include <data/game.hpp>
+#include <data/field.hpp>
+#include <util/io/package_manager.hpp>
 
 // ----------------------------------------------------------------------------- : StyleSheet
 
+StyleSheet::StyleSheet()
+	: card_width(100), card_height(100)
+	, card_dpi(96), card_background(*wxWHITE)
+{}
+
+StyleSheetP StyleSheet::byGameAndName(const Game& game, const String& name) {
+	return packages.open<StyleSheet>(game.name() + _("-") + name + _(".mse-style"));
+}
+
 String StyleSheet::typeNameStatic() { return _("style"); }
 String StyleSheet::typeName() const { return _("style"); }
+
+String StyleSheet::fullName() const { return full_name; }
+InputStreamP StyleSheet::openIconFile() {
+	if (!icon_filename.empty()) {
+		return openIn(icon_filename);
+	} else {
+		return game->openIconFile(); // use game icon by default
+	}
+}
+IMPLEMENT_REFLECTION(StyleSheet) {
+	// < 0.3.0 didn't use card_ prefix
+	tag.addAlias(300, _("width"),      _("card_width"));
+	tag.addAlias(300, _("height"),     _("card_height"));
+	tag.addAlias(300, _("dpi"),        _("card_dpi"));
+	tag.addAlias(300, _("background"), _("card_background"));
+	tag.addAlias(300, _("info_style"), _("set_info_style"));
+	
+	REFLECT(game);
+	REFLECT(full_name);
+	REFLECT_N("icon",          icon_filename);
+	REFLECT(init_script);
+	REFLECT(card_width);
+	REFLECT(card_height);
+	REFLECT(card_dpi);
+	REFLECT(card_background);
+	if (game) {
+		if (tag.reading()) {
+			card_style    .init(game->card_fields);
+			set_info_style.init(game->set_fields);
+		}
+		REFLECT(card_style);
+		REFLECT(set_info_style);
+	}
+//	io(_("extra field"), extraSetFields);
+//	extraInfoStyle.init(extraSetFields);
+//	io(_("extra style"), extraInfoStyle);
+}
+
+
+// special behaviour of reading/writing StyleSheetPs: only read/write the name
+
+void Reader::handle(StyleSheetP& stylesheet) {
+	if (!game_for_reading()) {
+		throw InternalError(_("game_for_reading not set"));
+	}
+	stylesheet = StyleSheet::byGameAndName(*game_for_reading(), value);
+}
+void Writer::handle(const StyleSheetP& stylesheet) {
+	handle(stylesheet->name());
+}
diff --git a/src/data/stylesheet.hpp b/src/data/stylesheet.hpp
index 9766eec5..3cde9510 100644
--- a/src/data/stylesheet.hpp
+++ b/src/data/stylesheet.hpp
@@ -11,23 +11,46 @@
 
 #include <util/prec.hpp>
 #include <util/io/package.hpp>
+#include <script/scriptable.hpp>
 
 DECLARE_POINTER_TYPE(Game);
+DECLARE_POINTER_TYPE(StyleSheet);
+DECLARE_POINTER_TYPE(Field);
+DECLARE_POINTER_TYPE(Style);
 
 // ----------------------------------------------------------------------------- : StyleSheet
 
 /// A collection of style information for card and set fields
 class StyleSheet : public Packaged {
   public:
-	GameP game;
-	double card_width;		///< The width of a card in pixels
-	double card_height;		///< The height of a card in pixels
+	StyleSheet();
+	
+	GameP game;						///< The game this stylesheet is made for
+	String full_name;				///< Name of this game, for menus etc.
+	String icon_filename;			///< Filename of icon to use in NewWindow
+	OptionalScript init_script;		///< Script of variables available to other scripts in this stylesheet
+	double card_width;				///< The width of a card in pixels
+	double card_height;				///< The height of a card in pixels
+	double card_dpi;				///< The resolution of a card in dots per inch
+	Color  card_background;			///< The background color of cards
+	/// The styling for card fields
+	/** The indices should correspond to the set_fields in the Game */
+	IndexMap<FieldP, StyleP> card_style;
+	/// The styling for set info fields
+	/** The indices should correspond to the set_fields in the Game */
+	IndexMap<FieldP, StyleP> set_info_style;
 	
 	static String typeNameStatic();
 	virtual String typeName() const;
 	virtual String fullName() const;
 	virtual InputStreamP openIconFile();
 	
+	/// Load a StyleSheet, given a Game and the name of the StyleSheet
+	static StyleSheetP byGameAndName(const Game& game, const String& name);
+	
+	/// name of the package without the game name
+	String styleName();
+	
   private:
 	DECLARE_REFLECTION();
 };
diff --git a/src/gui/control/card_editor.cpp b/src/gui/control/card_editor.cpp
new file mode 100644
index 00000000..b7df053e
--- /dev/null
+++ b/src/gui/control/card_editor.cpp
@@ -0,0 +1,21 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <gui/control/card_editor.hpp>
+
+// ----------------------------------------------------------------------------- : DataEditor
+
+DataEditor::DataEditor(Window* parent, int id, long style)
+	: CardViewer(parent, id, style)
+{}
+
+
+// ----------------------------------------------------------------------------- : Event table
+
+BEGIN_EVENT_TABLE(DataEditor, CardViewer)
+END_EVENT_TABLE  ()
diff --git a/src/gui/control/card_editor.hpp b/src/gui/control/card_editor.hpp
new file mode 100644
index 00000000..93c54c5d
--- /dev/null
+++ b/src/gui/control/card_editor.hpp
@@ -0,0 +1,29 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_GUI_CONTROL_CARD_EDITOR
+#define HEADER_GUI_CONTROL_CARD_EDITOR
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+#include <gui/control/card_viewer.hpp>
+
+// ----------------------------------------------------------------------------- : DataEditor
+
+/// An editor for data values (usually a card)
+class DataEditor : public CardViewer {
+  public:
+	DataEditor(Window* parent, int id, long style = 0);
+  private:
+	DECLARE_EVENT_TABLE();
+};
+
+/// By default a DataEditor edits cards
+typedef DataEditor CardEditor;
+
+// ----------------------------------------------------------------------------- : EOF
+#endif
diff --git a/src/gui/control/card_viewer.cpp b/src/gui/control/card_viewer.cpp
index 09ac115f..4846585a 100644
--- a/src/gui/control/card_viewer.cpp
+++ b/src/gui/control/card_viewer.cpp
@@ -12,13 +12,17 @@
 
 // ----------------------------------------------------------------------------- : CardViewer
 
-CardViewer::CardViewer(Window* parent, int id, int style)
+CardViewer::CardViewer(Window* parent, int id, long style)
 	: wxControl(parent, id, wxDefaultPosition, wxDefaultSize, style)
 {}
 
 wxSize CardViewer::DoGetBestSize() const {
 	wxSize ws = GetSize(), cs = GetClientSize();
-	return wxSize(set->stylesheet->card_width, set->stylesheet->card_height) + ws - cs;
+	if (set && set->stylesheet) {
+		return wxSize(set->stylesheet->card_width, set->stylesheet->card_height) + ws - cs;
+	} else {
+		return cs;
+	}
 }
 
 void CardViewer::onPaint(wxPaintEvent&) {
diff --git a/src/gui/control/card_viewer.hpp b/src/gui/control/card_viewer.hpp
index f9c0b24d..6ff329fd 100644
--- a/src/gui/control/card_viewer.hpp
+++ b/src/gui/control/card_viewer.hpp
@@ -17,7 +17,7 @@
 /// A control to view a single card
 class CardViewer : public wxControl, public DataViewer {
   public:
-	CardViewer(Window* parent, int id, int style);
+	CardViewer(Window* parent, int id, long style = 0);
 	
   protected:
 	/// Return the desired size of control
diff --git a/src/gui/set/cards_panel.cpp b/src/gui/set/cards_panel.cpp
index ae142948..9d73042a 100644
--- a/src/gui/set/cards_panel.cpp
+++ b/src/gui/set/cards_panel.cpp
@@ -8,6 +8,7 @@
 
 #include <gui/set/cards_panel.hpp>
 #include <gui/control/card_list.hpp>
+#include <gui/control/card_editor.hpp>
 #include <gui/icon_menu.hpp>
 #include <data/set.hpp>
 #include <data/action/set.hpp>
@@ -21,8 +22,9 @@ CardsPanel::CardsPanel(Window* parent, int id)
 	: SetWindowPanel(parent, id, false)
 {
 	// init controls
+//	Panel* notesP
+	editor   = new CardEditor(this, ID_EDITOR);
 //	splitter = new SplitterWindow(&this, wxID_ANY, wxDefaultPosition, wxDefaultSize, 0);
-//	card_list = new EditCardList(splitter, idCardList);
 //	card_list = new EditCardList(splitter, ID_CARD_LIST);
 	card_list = new CardListBase(this, ID_CARD_LIST);
 	// init splitter
@@ -37,6 +39,7 @@ CardsPanel::CardsPanel(Window* parent, int id)
 	SetSizer(s);
 */
 	wxSizer* s = new wxBoxSizer(wxHORIZONTAL);
+	s->Add(editor,    0, wxRIGHT, 2);
 	s->Add(card_list, 1, wxEXPAND);
 	SetSizer(s);
 }
@@ -46,7 +49,7 @@ CardsPanel::~CardsPanel() {
 }
 
 void CardsPanel::onChangeSet() {
-//	editor->setSet(set);
+	editor->setSet(set);
 	card_list->setSet(set);
 /*	// resize editor
 	Sizer* s = sizer;
@@ -207,5 +210,5 @@ CardP CardsPanel::selectedCard() const {
 }
 void CardsPanel::selectCard(const CardP& card) {
 	card_list->setCard(card);
-//	editor->setCard(card);
+	editor->setCard(*card);
 }
\ No newline at end of file
diff --git a/src/gui/set/cards_panel.hpp b/src/gui/set/cards_panel.hpp
index 7971a540..c7c89118 100644
--- a/src/gui/set/cards_panel.hpp
+++ b/src/gui/set/cards_panel.hpp
@@ -14,6 +14,7 @@
 
 class wxSplitterWindow;
 class CardListBase;
+class DataEditor;
 
 // ----------------------------------------------------------------------------- : CardsPanel
 
@@ -92,9 +93,9 @@ class CardsPanel : public SetWindowPanel {
   private:
 	// --------------------------------------------------- : Controls
 	wxSplitterWindow* splitter;
-//	Editor*       editor;
-	CardListBase* card_list;
-//	DataTextCtrl* notes;
+	DataEditor*       editor;
+	CardListBase*     card_list;
+//	DataTextCtrl*     notes;
 	
 	// --------------------------------------------------- : Menus & tools
 	wxMenu* cardMenu, formatMenu;
diff --git a/src/gui/set/window.cpp b/src/gui/set/window.cpp
index 871f93e5..146d9fe8 100644
--- a/src/gui/set/window.cpp
+++ b/src/gui/set/window.cpp
@@ -12,6 +12,7 @@
 #include <gui/set/set_info_panel.hpp>
 #include <gui/set/style_panel.hpp>
 #include <gui/set/stats_panel.hpp>
+#include <gui/control/card_list.hpp>
 #include <gui/about_window.hpp>
 #include <gui/new_window.hpp>
 #include <gui/icon_menu.hpp>
@@ -540,12 +541,18 @@ void SetWindow::onHelpAbout(wxCommandEvent&) {
 	wnd.ShowModal();
 }
 
-// ----------------------------------------------------------------------------- : Window events - menu - for child panel
+// ----------------------------------------------------------------------------- : Window events - other
 
 void SetWindow::onChildMenu(wxCommandEvent& ev) {
 	current_panel->onCommand(ev.GetId());
 }
 
+void SetWindow::onCardSelect(CardSelectEvent& ev) {
+	FOR_EACH(p, panels) {
+		p->selectCard(ev.card);
+	}
+}
+
 // ----------------------------------------------------------------------------- : Event table
 
 BEGIN_EVENT_TABLE(SetWindow, wxFrame)
@@ -586,5 +593,5 @@ BEGIN_EVENT_TABLE(SetWindow, wxFrame)
 	EVT_CLOSE			(						SetWindow::onClose)
 //	EVT_TIMER			(wxID_ANY,				SetWindow::onTick)
 //	EVT_IDLE			(						SetWindow::onIdle)
-//	EVT_CARD_SELECT		(wxID_ANY,				SetWindow::onCardSelect)
+	EVT_CARD_SELECT		(wxID_ANY,				SetWindow::onCardSelect)
 END_EVENT_TABLE  ()
diff --git a/src/gui/set/window.hpp b/src/gui/set/window.hpp
index eacf1fcd..17fe4e53 100644
--- a/src/gui/set/window.hpp
+++ b/src/gui/set/window.hpp
@@ -16,6 +16,7 @@
 class IconMenu;
 class SetWindowPanel;
 class wxFindDialogEvent;
+struct CardSelectEvent;
 
 // ----------------------------------------------------------------------------- : SetWindow
 
@@ -150,9 +151,11 @@ class SetWindow : public wxFrame, public SetView {
 	void onHelpIndex           (wxCommandEvent&);
 	void onHelpAbout           (wxCommandEvent&);
 	
-	// --------------------------------------------------- : Window events - menu - for child panel
+	// --------------------------------------------------- : Window events - other
 	
 	void onChildMenu           (wxCommandEvent&);
+	
+	void onCardSelect          (CardSelectEvent&);
 };
 
 // ----------------------------------------------------------------------------- : EOF
diff --git a/src/mse.vcproj b/src/mse.vcproj
index 591fbc22..5a4eba23 100644
--- a/src/mse.vcproj
+++ b/src/mse.vcproj
@@ -362,6 +362,12 @@
 			<Filter
 				Name="control"
 				Filter="">
+				<File
+					RelativePath=".\gui\control\card_editor.cpp">
+				</File>
+				<File
+					RelativePath=".\gui\control\card_editor.hpp">
+				</File>
 				<File
 					RelativePath=".\gui\control\card_list.cpp">
 				</File>
diff --git a/src/render/card/viewer.cpp b/src/render/card/viewer.cpp
index 388807a2..5055a868 100644
--- a/src/render/card/viewer.cpp
+++ b/src/render/card/viewer.cpp
@@ -7,8 +7,14 @@
 // ----------------------------------------------------------------------------- : Includes
 
 #include <render/card/viewer.hpp>
+#include <render/value/viewer.hpp>
+#include <data/set.hpp>
+#include <data/stylesheet.hpp>
+#include <data/card.hpp>
 #include <data/field.hpp>
 
+DECLARE_TYPEOF_COLLECTION(ValueViewerP);
+
 // ----------------------------------------------------------------------------- : DataViewer
 
 
@@ -28,9 +34,24 @@ Value* DataViewer::focusedValue()  const { return nullptr; }
 
 // ----------------------------------------------------------------------------- : Setting data
 
+void DataViewer::setCard(Card& card) {
+	assert(set);
+	setStyles(set->stylesheet->card_style);
+	setData(card.data);
+}
 
 // ----------------------------------------------------------------------------- : Viewers
 
+void DataViewer::setStyles(IndexMap<FieldP,StyleP>& styles) {
+}
+
+void DataViewer::setData(IndexMap<FieldP,ValueP>& values) {
+	FOR_EACH(v, viewers) {
+		v->setValue(values[v->getField()]);
+	}
+}
+
+
 ValueViewerP DataViewer::makeViewer(const StyleP& style) {
 	return style->makeViewer(*this, style);
 }
diff --git a/src/render/value/viewer.cpp b/src/render/value/viewer.cpp
index 337e9348..a6bc3dd9 100644
--- a/src/render/value/viewer.cpp
+++ b/src/render/value/viewer.cpp
@@ -10,6 +10,11 @@
 
 // ----------------------------------------------------------------------------- : ValueViewer
 
+void ValueViewer::setValue(const ValueP& value) {
+	assert(value->fieldP == styleP->fieldP); // matching field
+	valueP = value;
+	onValueChange();
+}
 
 // ----------------------------------------------------------------------------- : Development/debug
 
diff --git a/src/render/value/viewer.hpp b/src/render/value/viewer.hpp
index b38456f1..5841a013 100644
--- a/src/render/value/viewer.hpp
+++ b/src/render/value/viewer.hpp
@@ -12,6 +12,7 @@
 #include <util/prec.hpp>
 #include <util/rotation.hpp>
 #include <util/real_point.hpp>
+#include <data/field.hpp>
 
 class DataViewer;
 class ValueAction;
@@ -26,7 +27,12 @@ class ValueViewer {
   public:
 	/// Construct a ValueViewer, set the value at a later time
 	ValueViewer(DataViewer& parent, const StyleP& style);
-	virtual ~ValueViewer();
+	virtual ~ValueViewer() {}
+	
+	/// Change the associated value
+	void setValue(const ValueP&);
+	/// Return the associated field
+	inline const FieldP& getField() const { return styleP->fieldP; }
 	
 	// Draw this value
 	virtual void draw(RotatedDC& dc) = 0;
@@ -46,13 +52,10 @@ class ValueViewer {
 	/// Called when an action is performed on the associated value
 	virtual void onAction(const ValueAction&, bool undone) { onValueChange(); }
 	
-	/// Change the associated value
-	void setValue(const ValueP&);
-	
   protected:
 	DataViewer& viewer;	///< Our parent object
-	StyleP style_;		///< The style of this viewer
-	ValueP value_;		///< The value we are currently viewing
+	StyleP styleP;		///< The style of this viewer
+	ValueP valueP;		///< The value we are currently viewing
 	
 	/// Should this viewer render using a platform native look?
 	bool nativeLook() const;
@@ -70,8 +73,9 @@ class ValueViewer {
   public:														\
 	Type(DataViewer& parent, const Type ## StyleP& style)		\
   private:														\
-	inline Type##Style style() const { return *value_; }		\
-	inline Type##Value value() const { return *value_; }
+	inline Type##Style& style() const { return *styleP; }		\
+	inline Type##Value& value() const { return *valueP; }		\
+	inline Type##Field& field() const { return styleP->field(); }
 
 
 // ----------------------------------------------------------------------------- : EOF
diff --git a/src/util/io/get_member.hpp b/src/util/io/get_member.hpp
index 3e626966..e7b39f96 100644
--- a/src/util/io/get_member.hpp
+++ b/src/util/io/get_member.hpp
@@ -28,6 +28,7 @@ class GetDefaultMember {
 	/// Tell the reflection code we are not reading
 	inline bool reading()   const { return false; }
 	inline bool isComplex() const { return false; }
+	inline void addAlias(int, const Char*, const Char*) {}
 	
 	inline void handleAppVersion() {} // no effect
 	
@@ -68,6 +69,7 @@ class GetMember : private GetDefaultMember {
 	/// Tell the reflection code we are not reading
 	inline bool reading()   const { return false; }
 	inline bool isComplex() const { return false; }
+	inline void addAlias(int, const Char*, const Char*) {}
 	
 	/// The result, or script_nil if the member was not found
 	inline ScriptValueP result() { return gdm.result(); } 
diff --git a/src/util/io/reader.cpp b/src/util/io/reader.cpp
index 55e1bce2..40507d37 100644
--- a/src/util/io/reader.cpp
+++ b/src/util/io/reader.cpp
@@ -30,6 +30,11 @@ Reader::Reader(const String& filename)
 	moveNext();
 }
 
+void Reader::addAlias(Version end_version, const Char* a, const Char* b) {
+	if (app_version < end_version) {
+		aliasses[a] = b;
+	}
+}
 
 void Reader::handleAppVersion() {
 	if (enterBlock(_("mse_version"))) {
@@ -113,6 +118,11 @@ void Reader::readLine() {
 	}
 	key   = cannocial_name_form(trim(line.substr(indent, pos - indent)));
 	value = pos == String::npos ? _("") : trim_left(line.substr(pos+1));
+	// aliasses?
+	map<String,String>::const_iterator it = aliasses.find(key);
+	if (it != aliasses.end()) {
+		key = it->second;
+	}
 }
 
 void Reader::unknownKey() {
diff --git a/src/util/io/reader.hpp b/src/util/io/reader.hpp
index 677cc266..97e0f2e5 100644
--- a/src/util/io/reader.hpp
+++ b/src/util/io/reader.hpp
@@ -46,6 +46,8 @@ class Reader {
 	inline bool reading() const { return true; }
 	/// Is the thing currently being read 'complex', i.e. does it have children
 	inline bool isComplex() const { return value.empty(); }
+	/// Add a as an alias for b, all keys a will be replaced with b, only if app_version < end_version
+	void addAlias(Version end_version, const Char* a, const Char* b);
 	
 	/// Read and check the application version
 	void handleAppVersion();
@@ -80,7 +82,7 @@ class Reader {
 	template <typename T> void handle(Scriptable<T>&);
 	// special behaviour
 	void handle(GameP&);
-	void handle(StyleSheet&);
+	void handle(StyleSheetP&);
 	
 	// --------------------------------------------------- : Data
 	/// App version this file was made with
@@ -98,6 +100,8 @@ class Reader {
 	int expected_indent;
 	/// Did we just open a block (i.e. not read any more lines of it)?
 	bool just_opened;
+	/// Aliasses for compatability
+	map<String, String> aliasses;
 	
 	/// Filename for error messages
 	String filename;
diff --git a/src/util/io/writer.hpp b/src/util/io/writer.hpp
index 010e7fc9..e61904ba 100644
--- a/src/util/io/writer.hpp
+++ b/src/util/io/writer.hpp
@@ -31,6 +31,7 @@ class Writer {
 	/// Tell the reflection code we are not reading
 	inline bool reading()   const { return false; }
 	inline bool isComplex() const { return false; }
+	inline void addAlias(int, const Char*, const Char*) {}
 	
 	/// Write the application version
 	void handleAppVersion();
@@ -65,7 +66,7 @@ class Writer {
 	template <typename T> void handle(const Scriptable<T>&);
 	// special behaviour
 	void handle(const GameP&);
-	void handle(const StyleSheet&);
+	void handle(const StyleSheetP&);
 	
   private:
 	// --------------------------------------------------- : Data