Dynamic Search

I need to create a search/filter system for a client site which is dynamic and updates the images in the results on the fly depending on the slections made. A similar example is at [login to view URL] but my results would be images and not use as many sliding bars. For My project user would: 1. Select from one of 20 categories (Car, Van, Bike etc) 2. If the user selects Car a new set of options appear dynamically 3. As user makes selections (Make, Model, Engine etc) the results automatically update Other features * Results have options to "Add to Fav, Shortlist, Send to Friend (these would be icons attatched to the images or as roll overs * Images results enlarge when hovered over * Clicking image opens more details (maybe as a popup on screen) See demo 5 at: [login to view URL] * the user never needs to press search as the results are always updating