So I was sitting in my plywood house at FOB Lagman in Afghanistan the other night leafing through the fan made supplement for Adeptus Astartes by the Patriot and Darthbane on my laptop when it occured to me that there is another way of doing space marines in Dark Heresy (or even RT). Of course in 2010 we should have full fledged space marine rules, but anyway....
Neophyte: Neophyte would be a "origin" PCs could choose. It basically means the character is from a Space Marine home world and has undergone the basic begining indoctrination, training and implants to become a space marine, while not getting the full set of implants and official "hazing" into the Chapter.
How I would use them in DH is simple. Being neophytes without all the implants they do not have the size and mass of a true full space marine (yet at least) and therefore can still go undercover and or blend into the normal setting. And yet they would still have skills, talents and assets useful to a Inquisitor and the connections needed within the proper order.
More later.
I can deal with Psykers though by being completely ruthless with the rules.