So Aaron makes 6 now.
Titanic look at the Boxster install and then add maybe 5 minutes to that for the Cayman install. The Cayman (or 997 coupe) install takes a little longer because you have to separate a fitting re-route the CAN bus wires and put the fitting back together. It isn't complicated and the only tools you need to do the job are the following:
I'm sure smounic and fadiboy will be reporting their own install stories soon.