ok....been fooling around (cause i dont know mental ray SSS at all). Not sure if Im going about this the right way, but it is atleast getting somewhere.
The bunny has a multi/subobject mat on it with 3 SSS shaders on it. One for the skin (i want it to look plasticy) one for the nose and one for the ears
At first i was getting no results because somewhere along the line I had the bright idea to put a "B" in the scatter group to see what it does (having no clue), and never changed it back to a "A"....what is that for anyway?
I changed it back and started seeing changes, so been fooling around
here are some results.
This is the ears with only a Veins map in the bump slot (all of them have this on):