Move an object by interacting with another object

I’m trying to make an interactive tour sort of thing where you can click on a door to move the camera x places to the side. How do I make it so you click on one object, but another actually moves? Can I do this without some complex parenting?

Here:

http://socialstorage.googlepages.com/monkeyfuzz_interact.blend

Hope that helps.

Yeah, thanks Social. That helps a lot.
By the way… do you spend your entire life helping people out on the forums?

It depends, I’m inbetween semesters right now, so I have some time to roam the net and mess around.