Add pay per click to existing meta search engine

I have PHP and MySQL database driven meta search engine website, I want to improve it adding the following features: Advertiser features: - Add the possibility for advertisers to sign up and have their own adm panel. - Info and password changing page. Lost password lookup tool. - Advertisers through their adm panel can then add their site to one or more search categories and define the bid for their listings in each category. - Advanced stats which are updated instantly. - Bid on banner space Administrator features: - Add to the current adm panel the ability of showing numbers of all members, clicks, banner clicks, today banners clicks, today clicks, average clicks per day, number of banners shown, total money collected, today money collected average money per day. Admin page lets you approve/deny submissions, view detailed info about members, and add/subtract money from their accounts. Admin area shows each member's bid listings. Admin can add credits to members. Generate stats reports - System settings to set: accept bids automatically, allow Paypal IPN Affiliate Program - Set up to pay for affiliates searches or affiliates clicks. - Affiliate earnings' summary for each month available in the admin section.