Hi Is this site using a directory script? I was just wondering which script is was using? Jewellery Shop Finder
I'd guess it's a custom script. Though, I've been out of the directory loop for a couple of years... but I've not seen a directory with the mod_rewrite setup like that (unless the owner modified it). The script appears on a quite a few different sites (more than 50), but a random check suggests that they're all owned by the same person / company. However, my checks were based on some of the ad copy -- the script could be elsewhere, but these were just places where they used the base template and just switched keywords around and used different database data.
After searching for a couple of minutes, i couldn't find anything that was related to any Software on the Web. Like rogan4567 said above, i also think its custom because alot of the writing and rules are not like any Software ive seen. Atleast, thats what i think from viewing their sources and Php files.