I am building a home theatre in my basement. I am interested in learning about the cabling and mounting requirements for a ceiling mounted front projector. It would be a LCD or DLP machine, not a big CRT type projector. I want to pre-wire with anything I would require in the foreseeable future. I think that means at least composite, S-Video and component video cables. I am not sure what to do about DVI? Does running a DVI-I cable cover me for all DVI type devices? Is there any other cable I should run for video or control? What kind of structure should I put in the ceiling to mount the projector to? I see projectors up to 20 lbs and wonder if I need anything special. The ceiling is 1/2" drywall over steel studs. Thanks for the help.