Custom Referral Source Wordpress Plugin

In need of a Wordpress plugin that works with current version (2.9.2) and above that will allow an incoming URL referral source formatted as ?ref=source appended to the URL then passed within the Wordpress site. Example workflow: * Banner ad is linked to site as [login to view URL] * When page is loaded on our site ([login to view URL]) the referral source (?ref=SHOE) is passed from page to page and never lost when navigating around the Wordpress site. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the worker's Worker Legal Agreement). 2) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 3) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Worker in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 4) Work done may not be used in the coder's portfolio without the expressed, written consent of the buyer. ## Platform Wordpress 2.9.2 +