Directory Creation

We run one of the UK’s leading Business Directory’s however the site is built in php and is not database driven. We need the site to function so that customers can place their own adverts- choosing their category and listing type etc(all we will need to do is approve each listing it via the back end). Required features; • Submission form allowing clients to create their own listings • Full Back End/Admin Section to create and manage listings • Search Enabled Features- to allow browsers to search for content via a search bar • Review system allowing each client on the directory to be reviewed and submitted pending approval • Client Profile Pages(containing contact details, photo’s, information, Logo etc) • Featured Listing Facility within category’s(to allow a top place listing which could also be highlighted) • Related Categories Features • Integrated automated payment solution so a client can pay if they choose a premium listing • We would prefer to use an advanced open source solution Please provide examples of projects & provide info on what software you intend to use...