Facebook application modification job

We have a Facebook application for our web site : It has the "connect" feature and used to invite friends (to the application and site membership) and posts to profile's wall after installs. What we want some modification on this : 1. Keep track of the invites (tracking if the new install is from an invitation, getting the profile id of the inviter) from [login to view URL] and also wall posts after installations. 2. We want to show on our web site (users account page) how many friends are invited and which accepted invitation. 3. Users will earn points for inviting friends. 4. There are some small bugs to be corrected. We want an experienced programmer for fast and good quality work. Give your best bid, we will work with the awarded bidder for further developments after this trial project.