Car Wiring - Adding lights

[rawfuls]

I know finding somebody on this board with knowledge of my exact car is going to be a difficult, so let's generalize.

My goal is to use some of HobbyKing's LED strips:
http://www.hobbyking.com/hobbyking/s...idProduct=8944

and have them light up whenever the doors open.

I'd be mounting them under the passenger glovebox, and under the front seats to provide ambient lighting.
And if I want, I'll probably use blue LEDs to make it look like a spaceshuttle!

In any case, I don't want this to be a HUGE mod, but rather something that is easily reversible.
Could I tape into the fuse box, and use a fuse, and if so- how?
Anybody know if there's a fuse for this lighting, where it turns off when doors are closed & on when doors are open?

I'm also going to be installing some of these into the trunk cargo area, but on a switch.
Is there anything special to this, or is it just a simple SPST switch wiring...?
Assuming it is, but since it IS a car, I'd never know.
(Going to be using the rear cigarette socket)