[Awund]

Dominions3 doesn't seem to check the checksum of .2h files, only of .trn files. Turning cheat detection off makes no difference for the checksum.

You can change the number of gems or gold you have in your .2h file, than load it with the normal client and you'll be able to use those gems / gold. It'll even fix the checksum for you once you click end turn. However this will be detected and all players will get "Message from host, player x has unexpected wealth, this could be caused by cheating". I guess you won't get this message if you turn cheat detection off (but I also see no sane reason to turn it off except when you're debugging something).