two tier membership script

Ok the last 2 times I kept getting bounced so lets hope 3rd times the charm. Please do not bid if you are not sure how to begin. I need affiliate software with standard features. Needs some custom modifications. Two types of accounts: free and paid. Free accounts are just like regular affiliate software - people signup for free to promote digital products and earn 50% commission. Paid accounts will have a recurring monthly charge and is supported by a 2-tier commission system. While promoting products with a free account earns members a 50% commission on every sale, promoting with a paid account earns them 100% commissions. To upgrade members will have to login to their control panel, click the upgrade button, and pay the recurring monthly fee. Sign-up would require only 2 fields - a name and a valid email address. A confirmation email with activation code would be sent after he joins to validate account. Users click the confirmation link and are taken to an account settings page to create a password. The script needs to be able to create a batch payment file (not using paypal). The file format should be tab-delimited and can be exported to Microsoft Excel. Batch payment file should be as follows: Column 1 - email address, Column 2 - payment amounts, Column 3 - Description I need to make the column fields customizable just in case I change payments processors. For ex. switching columns 2 and 3, or deleting or adding a new column. Script needs to excute crontab for membership. I will need to see demo of the script before payment. Please be able to accept Paypal for payment.