Install discount module into osCommerce(repost)

We need to implement a discount code module in our existing osCommerce site We need the discount code box to appear above the shopping cart. We're going to send a newsletter to one of our partners and we want to offer a discount to them if they purchase a specific product. The discount needs to be for specific products and shouldn't work for all products. We need to be able to set the amount of the discount and the specify the products to which it applies. Scheduled to start immediately. ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform osCommerce