Zombaio Billing Cross-Sells Program (CSP) mod

Hello, I am runnig an adult site first of all running the latest Clipbucket script. I am using Zombaio billing cascading to verotel. I would like to be able to use the Zombaio Cross-Sells Program (CSP). How it works: when a user is subscribing to one of my site they get an option to subscribe to another... My issue: if the user chooses to subscribe to the other site a user account needs to be automatically created by the zombaio script in the clipbucket database... but if that user already exist then that user account needs to be updated... the zombaio script is already install and works just need that addition to create the users for the Cross-Sells Program (CSP)