Well, the only ingame textures it uses are the orc one, to fix a small error with the alphaing of the unwrap, clouds, which is a particle emitter skin, and gutz, which is the corpse skin
So you can change anything except for the teamcolour sections just with the base skin, and if you fix up that alpha and just change the paths you can just use a single texture for all but the corpse, and its not like you'll change the corpse or particle skinning anytime soon
Also, do check out the portrait. I prefer to use cameras, but an idea on the last time I put this up was to give it a talking portrait, hence I used the Owlbear as a base and had to experiment with the camera for a while for a good position