Facebook application | Website

I have one script which work as milliondollerhomepage, means user can buy pixel and post there site url, i want to modify that script such that when a user click on the site favicon or icon posted in my site, a post will be posted to there friends wall with the link and message. and then need to count the user click and set-up some point mechanism. I think the script i have, have every thing just need to manipulate with the code and finalize the functions. Lowest budget with good rating will be preferred