How to turn door/dome lights of when running radio w/ Liftgate open

I have a 2003 Oldsmobile van. I want to go to drive-in movies. I'm wondering if there's a way to turn off dome and liftgate lights when the liftgate is open with key in the ignition in accessories position (running radio only). Your help is appreciated. Thanks.

I have a 2000 Silhouette and in the overhead console there is a switch with a bulb and a line thru it. This kills all lights inside the van, whether a door is open or if the kids in the back are playing with map lights.