Co-registration offers lead system

I need a Coreg lead generation system that will basically GET data passed from a signup form and post it to another URL. Here are few websites that work on same model [login to view URL], [login to view URL] looking for something very similar. Details Will need ability to POST data to multiple locations and insert data to a MySQL database, a cookie/session should be set. A random user id should also be created and stored at this time, and this value will need to be passed on as well. From there the data will be passed to a coregistration path and once the user is complete they will be forwarded back to a final page. Post reading verification question one - in MySQL what is a lookup table and when would it be used. The final page will also need some basic design / CSS on it and it will be on our domain and should still have all the data stored from the original POST when the cookie/session was created – this page will be full of links that will need to have that data passed to it as well. Prefer to work with some one who have already worked on a similar project. Thanks Jan