I've figured out what seems to be the problem.

Everything works until I start to fool around with the SetRegionOwner declarations. Can anyone please tell me how to declare this properly. Should I use the // marks for regions that are owned by the rebels? Or should I declare the owner as FN_REBEL??

Also what all those numbers seem to be at the SetStartLeader declaration? Can I put units in regions that are used in the High/Late period if my campaign is set in Early period? Like Kataphraktoi or Lithuanian Cavalry?

I would appreciate any anwsers. Thanks!