PayPal IPN script project

Hi, i had a programmer modify an open source cms script, so that i can set up recurring billing on my site via paypal. Here is what the script can do so far: -Charge subscribers monthly. -Make username and passwords for the subscribers. -Make accounts for subscribers. -Send subscribers confirmation email. Here is what i want added to the script. - I want the script to be able to be added multiple of times to my website or server. With ipn i can only have one call back url in the system, and i need to be able to run this script for every website that i have on my server. -Delete users automatically once they cancel their membership. I currently have to do it manually. - Be able to add different levels of memberships to my site. For example, silver, gold, and platinum. -Once users log in, they see sometype of news page so i can keep them updated on whats going on with the network. I need to be able to update this as well. I will need the project done in two days at the max. And programmer must teach me how to install this on future sites. need to have yahoo im and skype, take care and looking forward to working with you.