hehe, wicked aiii
Well, as for pics, unfortunately nothing yet, unless u want pics of just the components.
The motherboard of the pc is 17cm x 17cm and is called a mini-itx system. Check out the links below for more info on these: The screen with a little custom work and shaping of the hole, should fit directly into a double din space, which means that there is no room for a head unit, but plenty of room behind the screen for a small amp or some of the pc components.
I have been working on this for ages, and came up with the idea to hide all of the PC inside a CD Changer case (for stealth reasons) and then put it into the glovebox. If i could get hold of a broken cd changer that came from a leon, or one that would fit, i could figure out if it would all fit or not. I may need to build a custom case for it, but that i would pick up from b&q or something

The mp3car forums are a good place for a little bit of research, just do some searching in there to get some ideas. If you still want pics of the components, i can post some if you reply to this. Hope this gives you some ideas. The mini-itx website has many cases available too, with slimline cd-rom drives/dvd drives etc.
http://www.mini-itx.com
http://www.icp-epia.co.uk
http://www.mp3car.com/vbulletin/index.php