LaFemme Pro skin shaders are based on Snarly's EZSkin Python Script which does have some inherent problems but can get you to some approximations of 'real' skin.  IMHO, the traditional PoserSurface node is becoming obsolete, a relic code that is no longer feasible with the current versions of Poser.  It's a hard truth to accept but older and current content that is haphazardly put together with this technique will need to be reworked to render correctly.