i understand he wants something involved with the GPS, but that just means more work for john :ohwell:
here is shutcontrol
so when he turns off his car the PC will shutdown automatically after a given period of time
EDIT**
I just thought about this myself... Even shutcontrol might not work at times (i've got a laptop also) and if for some reason the AC/DC inverter becomes unplugged, or the cord jiggles out, etc, removing power from your system while you are driving then this program will execute. I still go to Menu -> Shutdown when i get out of the car.

