--- a/src/engine.h	Fri May 11 15:13:08 2007 +0000
+++ b/src/engine.h	Fri May 25 00:25:08 2007 +0000
@@ -105,6 +105,7 @@
 	byte refit_cost;
 	byte misc_flags;
 	byte callbackmask;
+	byte retire_early; ///< Number of years early to retire vehicle
 };
 
 struct Engine {
@@ -119,7 +120,7 @@
 	PlayerByte preview_player;
 	byte preview_wait;
 	byte player_avail;
-	byte type; ///< type, ie VEH_ROAD, VEH_TRAIN, etc. Same as in vehicle.h
+	VehicleType type; ///< type, ie VEH_ROAD, VEH_TRAIN, etc. Same as in vehicle.h
 };
 
 /**
@@ -271,6 +272,7 @@
 	EngineID from;
 	EngineID to;
 	EngineRenew *next;
+	GroupID group_id;
 };
 
 /**
@@ -316,7 +318,7 @@
  * @return The engine type to replace with, or INVALID_ENGINE if no
  * replacement is in the list.
  */
-EngineID EngineReplacement(EngineRenewList erl, EngineID engine);
+EngineID EngineReplacement(EngineRenewList erl, EngineID engine, GroupID group);
 
 /**
  * Add an engine replacement to the given renewlist.
@@ -326,7 +328,7 @@
  * @param flags The calling command flags.
  * @return 0 on success, CMD_ERROR on failure.
  */
-int32 AddEngineReplacement(EngineRenewList* erl, EngineID old_engine, EngineID new_engine, uint32 flags);
+int32 AddEngineReplacement(EngineRenewList* erl, EngineID old_engine, EngineID new_engine, GroupID group, uint32 flags);
 
 /**
  * Remove an engine replacement from a given renewlist.
@@ -335,12 +337,12 @@
  * @param flags The calling command flags.
  * @return 0 on success, CMD_ERROR on failure.
  */
-int32 RemoveEngineReplacement(EngineRenewList* erl, EngineID engine, uint32 flags);
+int32 RemoveEngineReplacement(EngineRenewList* erl, EngineID engine, GroupID group, uint32 flags);
 
 /** When an engine is made buildable or is removed from being buildable, add/remove it from the build/autoreplace lists
  * @param type The type of engine
  */
-void AddRemoveEngineFromAutoreplaceAndBuildWindows(byte type);
+void AddRemoveEngineFromAutoreplaceAndBuildWindows(VehicleType type);
 
 /* Engine list manipulators - current implementation is only C wrapper of CBlobT<EngineID> class (helpers.cpp) */
 void EngList_Create(EngineList *el);            ///< Creates engine list