Modify script for boats

Need to know if someone can modify a script to accept boat listings and alter search and advanced search criteria. When posting an ad, the seller will need to be able to input data for boats. Please see the search box on the home page of [login to view URL] and also the advanced search of the same site for example of what I need. Need to be able to search by distance from zip code, lenghth, manufacturer, price, year etc.... Of course the script would need to be modified to collect that data from the seller when they post an ad. Would also like simple boat theme design (graphic header). This will be phase 1 of this project. Three or four more phases to follow. Programmers sending mockup links will take preference. It is much easier for me to select a programmer once I see that they have the same vision of the site as I do. Here is the info for the script you need to modify. Information about the script [login to view URL] The script in action (demo) [login to view URL] There is a login for the admin and the user so you can see what the mechanics of the site look like.