Add Paypal buy button to website and send shipping information to DVD fulfillment site

Im selling a DVD and need the paypal button added to my website sales page, A graphic of a DVD should be added next to the buy now button. After the customer pays, I need the shipping information sent automatically to the DVD fulfillment company to send out the order. [login to view URL] User should be sent to a thank you page once the order has been completed. The site is built in PHP.