Continuing the discussion from WIP installation errors (Cycles not running):
I've updated the Cycles for Rhino plug-in to v0.0.2. This should load in most recent Rhino WIP without problems. If you find otherwise, please let me know.
If you don't know what this is for then it is safe to skip this plug-in for now
Remember that this plug-in isn't officially released yet, nor is it currently part of Rhino WIP (but hopefully will be sometime this year). The main focus is on the
Raytraced viewport mode and everything related to it. That said, this plug-in should work.