Modify Custom FB Viral Script

I currently have a viral facebook application which is written in php and uses mysql. This app has been sold to people so its not one of a kind. I would like the source code changing so it has extra features, and also so the footprints it leaves on facebook are different to the other app owners. Most of the viral scripts out there have a specific footprint that facebook looks for and deletes. If you know how to prevent this please bid and explain in PM. The application is a working app, i just require extra features adding in php to my specification so the Freelancer applicant must be preficient in facebook apis and facebook iframed development. Hence FBML must not be used. This job needs to be completed quickly and without errors. Your editted script will be tested and you will not be paid if it does not pass our testing and is basically the same script we provided to modify. If you have read these requirements, please state in your bid exactly what it is we are asking for. If you do not, you're bid will be completely ignored. This is a small project (estimated $40-$100), please do not bid more than this without justification. Thankyou