Crop photos of cars

I have about 275 pictures of cars that have vanity (personalized) license plates. I need each picture cropped to highlight the car and not the surroundings.

Example

input: http://dl.dropbox.com/u/131764/web/vanity_example.jpeg
output: http://dl.dropbox.com/u/131764/web/vanity_example_small.jpeg

A few additional details

1. I have the files in a Dropbox folder. The simplest way to give you the data would be for you to install Dropbox; then I can share the folder with you and the files will show up on your computer. If this is a problem I can upload them to an online album, but I would strongly prefer Dropbox.

2. Please name your output files according to the license plate. In the above example, you should name the output TLGATER.jpeg.

3. There are a few duplicates. (The number of unique cars is 275; including dupes the number of pictures is about 450.) Use your judgement about picture quality to pick only one picture per car. The duplicates have consecutive filenames so it is trivial to see them.

4. For a small fraction of cars (about 5%) the license plate is not readable in the picture due to poor lighting. You are NOT required to do anything about this. If you can enhance them, I will be happy to pay extra. We can discuss this after the cropping task is completed.

5. I photograph vanity plates on a regular basis -- about 100 cars in a good month. If I'm happy with your work I would like to work with you on a regular basis.