Here's the setup for glittery skin on SSS Pro shader. Actually, its the same as earlier except I plugged the Blinn into Highlight_Size.

As you can see, my version sucks. You'll want to fool around with the size of the sparkles in the Noise node.  Highlight_Size channel is controling how large the highlight size is - yeah, your probably knew that, but this time its also controling how large an area the glitter spreads. Also, you can use an actual texture map for the glitter if you don't mind making one.

And now to go over the questions you asked! One more post to make!