Hello Hygric.

Checking the Dungeon forum like Gregoshi said is a very good thing to do.

You can type .conan. during any campaign and you'll play as rebel.

You could download http://www.totalwar.org/Downloads/MTW/Stats.shtml OrdaHorde.zip version 2. You can play the campaigns with mongols.

It also allows you to play with any of the 20 factions, though that one is not made to make a good campaign.