I just purchased a 2003 5-speed Boxster w/20,000 miles. The car is in perfect condition. I've got two minor issues. The AC shows the temperature in Celsius and the time is shown in 24hr format. The owners manual only describes how to change these features through the on-board computer. Unfortunately, my Boxster does not have an on-board computer. Can anyone tell me: 1. how to change the AC display from Celsius to Farenheit; and 2. how to change the time from 24hr (military time) to the standard 12hr format? Thanks to all!