240583 Members Database C/Panel

I have a website which sells an educational programme to schools/teachers/parents. The 'product' is a 12-Unit programme - each unit is a webpage which contains links to multiple PDF files. I need to use PayPal's IPN facility to receive and record sales and to deliver the download pages to the customers. BUT - the download pages MUST BE SECURE AND ACCESSIBLE ONLY BY THAT CUSTOMER. i.e., the customer must not be able to share the download link amongst friends etc. In addition to this, I want to run an affiliate programme with our product. The affiliate programme adds a small piece of hidden code to the PayPal buy-it-now button to register affiliate generated sales. The affiliate programme I am using is iDevAffiliate. The script you provide for me will generate a database of customers and other information as collected by the PayPal form and allocate a username (email address) and password for each customer. I want an admin control panel to be able to manually add customers, delete customers, change customer details, email the database and other features (all standard admin control panel features)which we can discuss if you are interested in bidding. It doesn't matter that your script and my affiliate programme are working independant of each other provided they do not conflict with each other. The script will need to come with full installation instructions for me to install as well as instructions for protecting my secure download pages. I will create my own database etc., so you will build your own mock-up of what I have described and do all of your tests without access to my website. Payment will be made once the scripts are fully tested and found to be working to my satisfaction. Regards, Dave