aMember Script

This is a preliminary request to find people who are familiar with the aMember script. I have the script at present and wish to make some major enhancements: 1. To be able to manage Group Permissions with a Group Administrator. For example, I would like to sign up 10 people under a Group Name and have each Group Member receive the same restricted access as the Group Administrator. Some products would have group pricing with discounts for more members. E.G. For 1 - 10 members the price would be $35.00, for 11 - 20 members the price would be $32.50, for 21+ members the price would be $30.00 2. I would like to have the script work across multiple domains. I am willing to discuss writing a completely new script if that is a better way to go.