We'll I dont own a 360, or a VZ, but I can still
try to help you out
Xbox 360 (clearly :whistling )
All the cables for the 360
Power converter (Either one that plugs into you cigarette lighter, or one you can hardwire into the car, You can get these from jaycar, dicksmiths, supercheap etc., check the first linky, right down the bottom of the page is a whole bunch of info about what one you need)
TFT/LCD screen, mounted where-ever (Back of the headrest, sun visors, above your headunit etc.)
Then depending on your car, if you have:
-a stock H.U then your going to need to set it up to take RCA inputs
-an aftermarket H.U then hopefully it takes inputs
-an amp which you can plug the audio directly into and run it from that
I'm a total n00b when it comes to audio so somebody else will have to help me there
Umm, and heres some linky's to have a look at :dance:
http://www.mechatroniks.com/wrx/xbox360.html
http://www.gamingblog.org/images/r_xbox360car.jpg
Just remember, the 360's love to overheat :rofl: so your going to need plenty of cooling for it!