Hey! Check out Fantasy Flight Games (www.fantasyflightgames.com
) they have quite a few 40k roleplaying systems, that are all compatible with each other.
Should get you started, if no one's got anything going already. I'm pretty positive they're the only 40k RPGs around too...
"In battle, if a man is to survive, must desire life like water, yet drink death like wine." -G.K Chesterton