IT can be done but not sure how to wire it in a pt.
Basicaly you wire it straight to the battery, or constant power of some kind. But in that wire you install a switch that will open or close with a "status change" ( power wire turning on or off ). I beleave it is called a "latching relay". In other words it sort of works like a relay. but will turn on or off with a secondary input ie.... status change- it turns on then stays on till the status changes then stays off. The bigest problem is finding a secondary wire that does what you want. this kind of switch is not that big and could be hidden under the dash. The dome light would work as it only is powered when you open the door. but it will turn the radio off if the passenger gets out.
a pic...
