I've completed the 1st draft of the rules for Doom: The Advanced Campaign and am proof-reading them now. I'm not going to upload this pile of crap anywhere public yet (making changes left and right) but if you really want to see it for yourself, PM me or email me at [email protected] an email address and I'll email it to you directly (350kb PDF, since there's no images in the manual yet). Please note it's a 1st draft of a rough draft, so it's still missing a lot of spit and polish.
-shnar