I tried Auto Calc once, but I lost too many units. Now I can't do it again, even though I reloaded the game.

As for the CTD, I was attacking with one army, no reinforcements. They had one reinforcement army from outside the settlement.

I've tried various things, such as delaying the siege etc, but I keep losing the battles now, I won before with 5% casualties before the CTD's. These CTD's, and other random crashes during battles, are really ruining EB for me, its a shame because its such as incredible mod.

Is there any cheat simply to remove the Aediu army?

Also, could I use a mod switcher programme to still keep EB and my savegames on it, while still having a version of the original RTW?