Directory w/Groupon Clone

I have a script on my website now at [login to view URL] I would like to add to it. I want to add a payment gateway that will allow dentist to sign-up for 3 different packages and I want to incorporate those three packages into the website. It is a directory database now with the basic search engine results. I want to have options for a basic listing, a premier listing, and sponsor listing. I also, want to add banner advertisements. Plus, I want to add the facebook, twitter and email a friend logo's and I want it to automatically post. There are a few little things here and there.