Attached Link: http://www.morphography.uk.vu/materialassign.html

BB's stocking shader is the business, except that Posette doesn't have separate leg material zones. So unless you want her clothed in an overall body stocking (!) you'll need to define a new material zone for the shader to use.

The link is my ages-old tutorial on how I used to do it. Should still work. ;) 

PS: how can you have something and not know its name? Just wondering...