I'd like a script that would automatically catalog car dealerships that were submitted by both location and product. So, for example, you could drill down by make first (by clicking on vehicle Make, then State, then City), or by Location (click State first, then City, then Make).

It should allow dealers to submit information on their dealership, hours, description, all makes offered, whether they also sell used cars, provide repairs, body shop, parts...

And, of course, should be entirely crawlable by the search engines.

Any ideas?

D