I'm using SSS Pro MU as the shader choice. I tried replacing the 'make up' option image of "v4_1_face.jpg" in both image slots with this new make up image, "s2v4_1_face_mu3.jpg".

I got this as a result(see attatched image). Sooo...I'm thinking, the problem with your earlier makeup choice is that the makeup was applied to the skin directly in the image editor, then Poser used the shader setup to apply that skin+makeup over the  skin texture(plugged into Diffuse-0) in the shader. Shader overkill, I guess:D

Try making your makeup again, but saving it against a white background. The input that new makeup into any image node using makup. That should fix it! If not give me  hollar! Or...however that's spelled! LOL