I still don't see why these mods are not allowed. I mean sure they poke at the T.o.C for altering the game data. But i feel it is one of those no harm no foul things.
If you want to look like an undead pally as a human pally when you are the only one would would actually see the change i dont see the problem, everyone else would still see you as a human pally and would not effect tother peoples gameplay what so ever, they wouldent even kno about it.
I know you are thinking well it starts with that and goes deeper into altering data etc, but if people want it, it will happen regardless.