i wish i'd be capable of doing something like that.
all i did was take the "basemod" folder, copy it, and in the copy i just changed the file for the ghouls to have 0 stats (or 1 hp, for when 0 would break the game), name them "gabghouls" to see if it worked and also gave them 100 upkeep instead of 1, so they are constantly starving themselves :D
i felt like a script kiddie doing that, but right now i'm trying my hands on retexturing a bit. would like some fancy grass, but that's actually the hardest part to do, because of the way tiling works.