To all you hotseat fans out there :

I haven't figured out a way how to play on a custom map in hotseat mode. Nobody in every Forum I tried, could give me an answer...

Please don't tell me it's impossible and I have to wait for an expansion (like with Civ3)...

if you're referring to scenarios, I see your point. there seems to be no way to choose a mod rather than the various generated maps.