I've got the PC raring to go (with wifi, BT and slot load DVD) a head unit which is single DIN but has a 3.5 inch screen
and DVD slot, with most of the wiring you describe above and a 7" touch screen TFT - just need to fabricate the bezel for the screen and tuck the HU out of the way (the wire it all up!) - prob a christmas holiday project me-thinks