I found I file that looks like it's got to do with the army, but I don't know, take a peek for yourself at
C:\Program Files\Lionhead Studios\Black & White 2\Data\Balance
Scroll down till you see a file called "GameBalenceArmy", it looks like it's messing with army unit's stats, but it's got a bunch of numbers that looks way to complicated for me to figure out, so if you have some free time, feel free to poke around with it. (remember, all good moders make back-ups)