I dont know if you guys have looked into getting a carpc...I am looking on mp3car.com and interested in going that route other than paying for all the seperate units. If you are not computer savvy though, I would stay away.
Basically it runs on an OS and pumps a frontend that is configured for your particular setup. The frontend is your menu and you choose what you want to do. Options are endless. You can add as many options as you want (or usb and firewire ports you have)
I am just trying to get a grasp on it now but will try and put together a project later on...be on the lookout...
Ohh and its gonna be going in my United Grey GTI...