Let me try to explain my opinion on this..

In 2006 you wanted as much detail as possible on the skin map. There was no SSS or IDL or GC or even HDRI. It would have been impossible in Poser and pcs of that time using Poser. Now,,, with IDL, etc... you do not want all that crap on the skinmap because you would be doubling up with it. The best way is to put it in with reflection and SSS,,, etc

If a lady in red dress walks into a white room, the whites pick up the reds through IDL and reflection... This is what I want... not for you,, I get it.

For you, you may consider stepping back in time a bit and use 2006 tech in your 2012 app for speed. IBL, rim/specular light, mainlight. Real Skin Shader. The one in the pic you like is no longer in his store. That was a total package.