Ok
so I re-wrote the way I was doing things. As one shader to do everything I wanted was not going to happen.
I am trying for this attempt to keep as true to the Dataset and parameters the Digital Human league have set out here:http://gl.ict.usc.edu/Research/DigitalEmily2/
So I made 4 passes ( Difusse SSS, Single Scatter, Primary Spec, Secondary Spec)
This is only being lit up by the HDR no other lights.
I used a Max's standard Phong shader for the Spec didnt really see any other way to get around this, but the results seem to be pretty on par with theirs, even though its not completely physically plausible. If corona has a way to turn its shader into phong that would be a great help.
I will do a Hires version later but I am very pleased with this version