QTR-Quadtone RIP

Hello,

i'm starting to try QTR on my 3800 w/Snow Leopard.
What is the proper way to use the ICC profiles contain in the software.

Is it better to choose : let the printer manage or use the QTR ICC appearing in the list?
Also, if my paper (Ilford Gold Fibre Silk)  is not listed in the ICC in the print menu, do i need to use none or UCpk-raw in the curve 1?

Thanks!