Hi.
1. It is a good idea to assign guides, clumps and skin geometry by selecting sop.
2. To make assign of fur procedural at sop context

2. I can be wrong but Mantra procedurals work on per-object basis so you can try to create material with procedural inside it and then assign that material using Material SOP but it has no sense.

Hey Hok! Check this
http://www.sidefx.com/index.php?option=com_forum&Itemid=172&page=viewtopic&t=11592 [sidefx.com]