Thanks! I have discovered the more-than-18-civs mod, and am currently in the process of adding quite a few civs: the Serbian Empire (very important; there's always been an empty space there anyway) Principality of Bulgaria (will be a vassal of Ottomans) Kingdom of Portugal, Old Swiss Confederacy (Perhaps not entirely accurate with Holy Rome...) Kingdom of Naples (Naples as a barbarian city doesn't cut it) Kingdom of Norway, and the Kingdom of Croatia (A bit obscure, only a possibility) I will keep working on this aspect for now as the major XML modding part is complete, except for the above problems. 
