Hi - as an avid gamer myself (mostly the classics UT, Quake, CS) I would be happy to work on this project for you! My bid is based upon the creation of a site template (fully commented and easily adapted for use with all content types) made to your specifications. A password protected upload section for admins to add maps (and file managment center) and threaded message board system. If you prefer I could use an exsisting Forum software but I do not think your project price range supports the construction of a complete forum package :)
thanks
Aaron Bassett