Let me jump in and give you a couple of pointers until BB gets things sorted out.  I had to go back and refamiliarize myself with this old post. 

Basically, under VSS you will need to create a new material zone to house your new set of shader nodes for stockings.  Assuming that you created new MAT zones for your model, this should be simple.  Once you have the VSS script running, navigate to Designer on the palette, and click on Add Material Zone.  See image.