BTW, have you consider putting a DVD drive up front, may be in the upper glove box?
I am thinking about that, it seem we can fit a 5.25" (cheaper?) slot loaded DVD drive there. Then use one of the IDE-USB 2.0 adapter like thisthis which only cost $16.
The problem is power, not sure if I would need a external powered usb hub to connec to the DVD, the touchpanel, a gamepad will also be running off this hub and the extension cable would be at lease 10ft I guess? If I do need external powered then I would like to get one that can powered by DC so I can wire into car's 12v or 5v? Do want to connect to PSU since it is alreayd under load.