I have some photos of the early version of the install using a G4 Powerbook. It just didn't fit anywhere without some kind of issue. That coupled with the fact it had to be started with the lid opened, then you could close it, made it a poor choice.
I just had the van painted, so the windshield was off. That gave me an opportunity to have some holes drilled in the back side of the glarescreen so the wires where neater. I had temporarily mounted the Mini on the heater box in the same position as the G4, but there is an issue with shifting on the Syncro. So, I have bought a spare glovebox assembly and am in the process of mounting it in there.
The least fun of this whole project was pulling the VGA cable down the A pillar. I had to cut and solder it besides maneuver it through a maze of thin openings and sharp metal edges. The noise thing is irritating, but I mainly put the system in for navigation. I will have to do some more EFI steps on the Mini. Sounds like the Cold War all over again, I will have to make it 'Tempest' safe.
If your interested in the Syncro, there are some pics of the Kitchen unit mod I did, and scroll down the page to the computer part and the recent paint job.
http://homepage.mac.com/greystoke.eng/PhotoAlbum12.html