With my mod the only real problem I had was with GameInfo\Civ4GameOptionInfos.xml. RevDCM's version of that file has some extra game options. If I tried using my version of Civ4GameOptionInfos, the mod would crash every time (with no error message).
EDIT:
Liambane, I just noticed that you tried RevDCM with a mod that has 40 Civs. You will probably get errors when trying to load a 40 Civ map with RevDCM's 50 civ dll. My mod used to use a 24 civ dll and it automatically loads the first map when it starts - that caused problems until I edit the WBS file to have 50 civs and 50 teams.