I have a MacBook that I use with a Dell 22" LCD external monitor. I was wondering if I could use my monitor as a TV. The outputs on my DirecTV box are S-Video, Composite Video, and USB. I know they make VGA to S-Video adapters and DVI to S-Video adapters. Could I just plug my DirecTV box into my monitor with one of the adapters and have it work? Also is there a way that I can have my MacBook on and connected to the monitor at the same the DirecTV box is on and connected to the monitor and be able to switch back and forth between the two? Thanks in advance!