I've got a Dell 2300 projector and a Macbook/dvd player/VCR/sega genesis hooked up to it. I'm trying to capture the video output of all these things (simultaneously with the audio, if at all possible) and run it into my Macbook. What sort of cables and/or hardware/software might I need? I've spent some time on google and such but all my searches pull up are "macbook to projector" instructions. Thanks!