Thanks for the help, everyone. It cleared up some misunderstandings I previously had. However, I seem to have run into a new problem in the process.

I created a geometry in 3DS Max and imported it to Poser to just fine. I loaded the Setup room, and then I applied the Michael 3.0 skeleton base, as well as its groups. What I have now is a figure with the SkinTorso, SkinHead and all other material zones from Michael 3.0. When I load my .obj in UVMapper like you all suggested, the SkinTorso, SkinHead and other Michael 3.0 specific material zones do not appear.

I am trying to get rid of the useless material zones while retaining the same skeleton of the figure I intend to conform the geometry to.