What in the hell...?
Does normal MedII work? Because I'm pretty 100% certain that is has nothing to do with the mod itself.
I had a similar problem with Rome TW, but it just CTD'd and re-install fixed it for me. Also, it was just due to 'old age' of the game.
Have you downloaded or updated something recently, like a virus scanner?
Turn times are pretty long, but this is a little excessive. How good is your computer?
Elvenkind and Veteraan had some posts adressing turn times a while back. I guess the search thread function might help you out a little too.