In the tutorial file I think it is there is an explination of preparing a head mesh for Face Shop Pro the first time.

The head part is exported from its default position after any expression morphs you might use such as "open mouth smile". Then in UVmapper Classic you select the face and lip materials on the head mesh and assign them to a new material called FaceShopSkin I think it is... the texture created by Face Shop will then be right on the lips. I suppose you could fix the materials with the grouping tool before leaving Poser if you wanted.

I never got that black neck effect... just a centerline from mirroring the texture and then shadows and hair that needed fixing up. I just paste on to a Merchant Resource texture and adjust the HSV to match.