Well if you wanted to make it more like a car show you could do like best of show, best in class, cleanest car (generation separated), and so on. But i also realize the more catergories the more entrants and picutres the harder and longer it would be to upload them all. But it would be nice to find a catergory for everyone.
then like for prizes. the seperate catergories could get like background, or clubcivic decals, or maybe even like a t-shirt or hat.. then like best of show could get a gift certificate to Tunersports or something.