2005 Mustang GT Door Sill Customization

Hello all,

Had an idea based on the illuminated door sill plates I've seen on American Muscle and ones that are installed in current generation 'stangs. Problem is, I don't have MyColor or any bells & whistles of that sort (since I don't think they had it back when my car got put together).

Considering money is rather tight when it comes to getting cosmetic things done to my car, I thought of an idea; why not illuminate the door sills myself? Idea is that I get the most bang for my buck (and I think it would be cooler to do it myself rather than just buy one of those $200 door sill kits).

Has anyone done this themselves/what methods did you use? So far I've come up with 2 possible ideas:

-Dremel out the plastic door sill and place EL sheet underneath/wire it into the ambient lighting so that it turns on/off when the door opens.

-Do the same except with LEDs.

Problem is, I have no clue on how to wire them into the car *safely*. Anybody have any experience with this before or know the right direction to point me in?