what my friend did was go to an auto-parts store and buy a thing called an add-a-circuit and a switch and some wire thats basically remote wire. the add a circuit allows you to get power from a fuse
you plug the thing into a fuse that will make the lights do what you want(on when headlights, on always, on domelight, etc{on meaning the ability to be on})
then you plug the regular fuse in there.
now you have a +12v power supply. you run the wire to the switch and all that and then ground whatever for your negative leads.
pretty simple wiring...just alot of screwin around to get there.
i did a similar thing w/ neons under the dash and in the trunk, and i think mine's cooler
o yeah, if you have the same fuse setup as mine...2 under hood, one in dash...most likely you'll have to cut the change holder(in front of fuses) for the add a fuse to fit. also, i put the switch in the loose change dish in the center console. you can't even see it unless the neons are on(the switch has an LED in it for when its on)