I wouldn't bother as the rules presented for those specific games are just fine.
But translating rules always starts, for me, with the PC races & classes. You will also have to deal with the technology which is way lower than SM. the Psyker/Psion stuff whould be able to be translated over fairly easily, just increase the fumble range by a fraction of the PP in the power used to emulate the inherent problem with those powers in DH/RT.