http://www.tomshardware.com/howto/20041113/index.html
I've decided to look into this as well and I encounted Tom's Hardware Guide's only decent article to date. The one you're building sounds pretty expensive though. Why not watercool yours? I think I might. An Eheim 1046 and a couple cheap waterblocks should do it. I've got a spare heatercore sitting around too.
What LCD and projector are you using, btw? I've got to start pricing stuff. It's great that 15" LCDs have dropped in price so much lately.