"Deus ex skining"

I want to learn how to skin (altering an existing skin that is). So I would like some advice or some nice tutorial links and, if there is any, skining tools/programs for DX models.
Basicly i just want to alter couple of details on simple skins (like making a black MJ12, can only see his mouth and nose, should be easy lol) and some couple other things.
While "googling" i come across a nice site that had a 3D view of the skin ur painting, but it was for UT, i wonder if such tool exist for DX.
Also what painting programs would you recommand ( i have Photoshop).
Thanks
Basicly i just want to alter couple of details on simple skins (like making a black MJ12, can only see his mouth and nose, should be easy lol) and some couple other things.
While "googling" i come across a nice site that had a 3D view of the skin ur painting, but it was for UT, i wonder if such tool exist for DX.
Also what painting programs would you recommand ( i have Photoshop).
Thanks
