I was making a mod where i wanted to give gorebulls dragon ogre weapons for appearance variety, but the mod wouldnt work

some one told me that i need to make wh_variantmodels so that i can tell the game that the Gorebull model can animate the Dragon Ogre axe or something of that nature, that this is something that you need to do when you items from one faction onto another

so i thought id ask you exactly just how this is done