The screen is a Thermaltake 7" touch screen, they are pretty expensive and are made for servers, i run a 12v ATX power supply to run power to it.
I also can get some 800mhz tiny pc units with 256mb ram (My unit will be here today, have been using my laptop in the mean time) and will be powering it off the 5v rail on the atx power supply as well as the USB hub, it takes a 2.5" hdd and will be able to run XP without any issues.
Well get more pictures of my setup once its completed. I can do you one of these little mini car PC's for about $200 delivered to your door, the screen costs about $500 retail, i got one cheap $399.
The screen has VGA input, also has RCA inputs but mine are not working have to send back for RMA next year.
I could also power the PC from the 5v rail out of the Vipec but the 5v shouldnt have too much current drawn because it supplys power to the sensors (map sensor etc etc)
So yeah let me know if you want one of these units..