digital media worldpay

i use a besoke shopping cart that uses access, the cart sells documents in total around 400 , purchasers may select as many as they like and to add to the basket,at the moment the cart sends the order id and total to wpay, what i need is a callback script that will also trigger the delivery of the documents by email on completion of sale, also these documents may be updated at any time and we wish to give the purchaser a free update within a 12mth period sent by email, outside that we would invite them to purchase the new update, all this must work as we update the relevant document, All that is required is modification of the original scripts which i will supply ## 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 windows 2003/using cdonts