Here's my contribution. I reinstalled from scratch today and it took less than fifteen minutes, I took pictures and compiled them in to a PDF, hopefully this will help reassure people that this thing can be installed easily without any great technical know-how.
Download the PDF here:
http://www.radarrack.com/boxster.html
Chris.
NOTE - If you do not already have a CD Changer the system must be updated with a PST2