Thought I'll just share this pics.
Just finished this yesterday after waiting 3 weeks for a custom to order Mac Mini... 2005 Cefiro.
Replaced the smart screen that came with the car originally with the reverse camera and VCD player, plonked in the 7" touchscreen. Reverse camera rewired and now works with the touchscreen :)
Hid the Mac Mini in the glovebox.
More pics of the installation and custom fabricated bezel here... http://www.mobycar.com/forum/viewtopic.php?t=19