Anyone know a php code/script to track sales I could use on AVS sites?

[RedCherry]

I wish I could write php from scratch, but I'm looking for a simple code I could put in tgp galleries for instance. The code would come from the page http://www.myavssite.com/index.php?tgpgallery1 and I could track it so if I look in my referring stats for the site, instead of the sale coming from just the join page, it would show it coming from tgpgallery1.php page or join.php?tgpgallery1 something like that.

Since I can't alter the way they track, If I can just have it show my join page as a unique page for every traffic source (since it does show the url of where the sales come from) then I'd know at least with the traffic I send, what works.

Could anyone program a snipped that would do this for me? I'd pay for it. Or know of some kind of software that would do this? I've tried searching for affiliate tracking software, stuff like that, but most of it tracks through to after the sale and won't help me.