Add New Functionality To Pre-Existing PHP/MySQL Script

Hello, I am in need of a PHP Programmer who can add a new function to a pre-existing PHP/MySQL script. The script is a fully functioning membership script. I would need the programmer to add a "Downline Builder" or "Self Replicating Website" featureto the script that will be able to be used by members and managed by the admin. I have 2 scripts with source code made by the same developer with the same framework that could be combined for an easier development process by you. I will give examples as necessary. Basically, if you can rip the feature out of one script and integrate it with the one I intend to use. Please let me know if you have any questions!