There's a spoiler in that link jirisys posted (between "EB-Alex step by step" and "AI unit use in battle") which contains the informations for manual adjustment of your files. It's not that hard to do it that way (even I was able to ).
I cross fingers though that you don't run into the same annoying issue as me (persistent crashes at campaign start with almost all factions).

Alternatively you could of course use jirisys' Megamod (which has the same issue in my case but seems to work for everyone else).