Well I've been threatening to do this, and as I've had the car a week now, it's about time I got it working. So here's my installation of a 400GB chipped xbox into the boot of my S8, it is connected to the rear entertainment system and the main nav screen. Control is either by the xbox controllers or the xbox DVD remote controller and I'm running XB media center. It auto boots in to this in about 15 seconds. The dash display showing a film playing.... Front and rear screen together.... The xbox installation, dont look at the wires... There's a shutdown controller which will shutdown the xbox 10 mins after the ignition is turned off. So you can get petrol etc without having to reboot.