Someone attempted to mod SE4 to a fantasy setting ... not much actual hope there. There are many things which are hard-coded in SE4 which you just can't overcome with a mod. There's no way to make the combat and experience systems much more sophisticated, and they're pretty limited. I've tried modding Aaron with email barrages about probability and cause & effect, but they didn't get very far.
(Besides, Dominions II is wunderbar, and is getting more and more mod options added.)
PvK