Pair Access URL with Google Advertisement Codes(repost)

At present, the Adsense Code is "fixed" in three places with seperate codes - two within the CMS and one that's just a regular block of code in a PHP file See [login to view URL] What I'm seeking to do is to be able to vary the Adsense Code by way of a script: So for example: [login to view URL] Results in [login to view URL], [login to view URL], [login to view URL] Adsense Codes loading And [login to view URL] Results in [login to view URL], [login to view URL], [login to view URL] Adsense Codes loading Etc I need to be able to "pair" up the URL variations and a Adsense codes. NB1: I've already had this done for the "download" url and wish for the same method to be implimented. See specification attached for further details.