The model is actually complete and you can fight against him as an NPC. He uses a custom skeleton and was never meant to be a playable character however.
Late replies are very late!
Because that's the closest thing i had around that vaguely looked like a machete.
3Ds Max for new head mesh and Photoshop for textures.
It's a multiplayer skin. If you want to use it in SP you'll need cheats (i think) or set him up as a new species.
Should be good for now unless something needs to be tweaked. Looking forward to the update. I've also checked in a playable Pic, just modify the bosses npc to Pic instead of reborn for the model.