This map was originally created for C&C Generals, which means that only the Generals skirmish AI (USA, China, GLA) was added. If you want to play skirmish games against the Zero Hour generals, you must use the Zero Hour World Builder (located in the game's main directory) to add the Zero Hour default AI. Open the World Builder, click FILE, click OPEN, click USER MAPS, click LAST STAND, click OK, click EDIT, click EDIT PLAYER LIST, click ADD SKIRMISH PLAYERS, click OK, click FILE, click SAVE.