Stunamar

Hey guys,
Is there a way to program the system to unlock all the doors when I either put the car in park or turn it off?
I keep my briefcase on the backseat and its a pain in the *** to press the remote button to unlock the doors or hit the button before getting out of the car...
I know this is a simple push of a button but there should be a way around this....I hope.

thanks