85680 Give Free Stuff Away Script

I am looking for a script made that is similar to: [login to view URL] I need it to be able to track users who click on the links of an offer. When they click on the link, it will need to ad &s=userid to the end of the link based on their user id. Very Fague but if you feel you can create a simple script similar to this bid and I will give full details. I do not want to post full details and have someone steal the concept at this time.