How can i get off a striped screw?

How can I get a stuck broken screw out of a rear license plate?

• So I was putting my girlfriend's plates+frame on her Civic, and being the he-man that I'm not, I managed to break the heads off both screws in two tries. I went to Home Depot and picked up one of those $20 removal kits for my drill and I managed to get one screw out, but the other one is seriously stuck in there. To make matters worse, during my initial try to get it out I broke off a crummy reverse threaded drill bit in there, so the new reverse bit while a quality part won't even dig into the screw. -edit- I don't have access to the screw from inside the trunk either, it's got a panel welded on it. Her plate+frame is on for now, but it's basically on with one screw and falls to the side every now and then... Is there any trick I can use to get the other screw out, or something decent I can do to secure the plate?

• Answer:

  Depending on how mechanism for holding the screw is attached to the car, you might have a couple of options. Some cars have plastic blocks embedded in the bumper. (Something like http://www.z1motorsports.com/popup_image.php?pID=3240&imageNum=2) If that the case, you can probably simply drill out the broken screw, and then either replace the block, or use a larger-size self-threading screw. Another method is a clip (Like http://img.alibaba.com/photo/228464945/u_clip_nuts.summ.jpg). If that's the case, you can probably use wire cutters to break apart the clip, spin it apart, and then replace it. Most auto parts stores will have many universal replacement parts what'll probably replace whatever you have if you destroy the existing mount.