my bro hooked his xbox to his lcd screen but he had to buy this back peace for the xbox or someshit i think and had to hook up some speakers to hear something, cuz its not like a reg tv. You need a router unless u have that modem/router with 4 ethernet outlets.
if you have a newer xbox with hdmi on the back you need to buy a hdmi to (whatever is the hook up on the back of the computer screen) which is most likely dvi or vga.
if not i think you gotta do something to make the 360 have dvi or vga. they sell the wires at game stores.