Freelance site mod

I need to mod my freelance script a bit. The script is already install at [login to view URL] Here is what I need done... 1. Install the paypal payment gateway. The payment gateway file is already created. 2. Buyers can specify if they want to restrict bids by location. Ex. City, state or country. Please make sure your have knowledge of this freelance script before you bid. You dont have to do any design work.