What is the best way to connect my computer to my projector? I use it for my mobile disc jockey service with live concert dvd's ripped into my computer. There are times I will have to run up to 50 feet of cable. My projector does not have a HDMI input. It does have RGB (15 pin), component, DVI and S-video inputs. I want the best picture quality possible. Also, My projector is 720p/1080i XGA (1024 x768 native resolution). Will anything like a line doubler help my picture when my source is a standard dvd player? 480 is not very good! Thanks, Kerry