Add ability to display previously purchased products to osc

We are currently running OsCommerce and would like to add the ability for a logged in customer to see items that they previously purchased with us. The key screens will be the [login to view URL] which displays the product detail information, search pages, shopping cart page and the confirm order page. The reason for this modification is that we have many customers that come back often and buy films and they would like to know if they had already purchased the film so that they do not have to send it back. Basically each fo the above screens need to display a message "* Previously Purchased Item" in red so they know thye had already bought that item from us. This would be determined by doing an sql to the orders_products table with the customer id and the product id to see if it was previously purchased byt that customer.