Small Affiliate Tracking Script

I need a script which performs the following. 1. User opens my website 2. A unique affiliate ID is created (but not assigned to anyone yet) - buttons to share these links via facebook/twitter. 3. Cookie is generated, If user returns he will see the same Affiliate ID. 4. If user chooses to Input Email and Clicks 'Save' the affiliate ID is now linked to his Email address. 5. Email is sent to email address, telling user his affiliate ID is now active. - password is generated automatically - next time user visits website, instead of affiliate link and share buttons, he will see his number or referrals and sales. or has option to login if not auto-detected. 6. When a 2nd user follows the 1st users affiliate link to the website, he is linked to the 1st User. 7. A cookie is generated, so if 2nd user returns to website he is still linked to 1st user. 8. 2nd user goes through the same process starting at (step 2) an affiliate link is generated for him. Also require a Success Landing Page, e.g. after successful purchase the user is redirected to the Success Landing Page. the Affiliate ID is then credited with 1 sale. and a simple function to pull a) Number of Referrals and b) Number of Sales from the database and display in html. NOTE: I know of and have used many publicly available Affiliate and MLM scripts in the past. However these all operate in such manner that the user first registered for an account and then an affiliate ID is generated. I do not want this, please do not waste my time. I need the affiliate ID to be created without any registration process... or before the registration process. Registration being when the user inputs his email address and clicks "Save''