Sorry... I haven't checked this board in years... I don't think I've done anything with modeling, mapping, or skinning in at least five years now. What's the exact question?
My last post seems to indicate the software you'll need. My comment before that indicates that in order to get a part of the model NOT to appear, you need to edit the text file which links the skin file to the model parts.
I've been deeply into Xbox since that time (with a brief stint in WoW).