Les,
If you're referring to the "old" materials of "skinFace", "skinScalp", and "SkinBody", they have been replaced with "skin_HEAD", "skin_BODY", "skin_LEGS", and "skin_ARMS".

That was necessary because the seams changed. For example, skinScalp no longer exists, since the face and scalp are now one material, i.e., "skin_HEAD", and the new groups for the arms and legs used to be just part of the body UVs.
I capitalized the words ARMS, LEGS, HEAD, and BODY at first to make it more evident what had changed. And in later versions I just kept it that way.

I saw that the older materials are still in there, and I assumed they were left there for this geometry switching thing that y'all have been talking about trying.

Edited...