I tried not playing on high priority and that seemed to do the trick in reguards to the CTD battles, at least for a little while.

I was playing as the Sweboz and attacked the settlement to the north east of their starting province, the island one, I can't remembed the damned name of it even though I saw it like...twelve seconds ago. Well I attacked it, and it loaded fine and everything, but in the middle of the battle when the main melee in the middle of the settlement began, it CTD, no error message or nothing, just a CTD.

My army had three Fraemamen, two generals, two Riderharjoz, and one unit of archers. The enemy army had one unit of Riderharjoz, I think two Fraemamen, one unit of those Swordsbondsmen, and one unit of those Germanic skirmisher guys, the "youthlings" or whatever they're called.

No idea what caused this, I'll retry the battle and see if it recurs