Made alts for every mob today for the randommobs mod now packaged with the HD patcher. Also made lava animation. Will release soon. Until then, here's some of the new mobs. (all old mob skins are still in the pack, We just added more)
I'm afraid I don't like many of the choices you made for the mobs. By adding so many alts to the zombies, redead zombies aren't common enough. White endermen just look weird, and most of the variations are, well not varied enough. That's just me.