For those interested in an Advanced Campaign expansion for Doom, I've completed the rulebook as detailed here: boardgamegeek.com/blogpost/12883/rulebook-beta
A few screenshots:
You can see detailed versions of the pics on the link above over on BGG. I'm calling for anybody who wishes to help me proofread the manual. I feel it's complete, and thus want potential players to read through and see if there are any confusing sections, glaring omissions, and just plain typos. Send me an email address and I'll forward along the docs.