I just started using osCommerce three weeks ago and I love it. However, I was desperately trying to find a way to track the various ad campaigns I was running for my new store (www.monkeygoods.com).
This modification allows you to keep track of where your registered users came from. For anyone running multiple ad banners or paid google-type links, knowing which ads are effective is pretty nice.
In addition, I wanted to capture the entire referring url so I could later see what the
users search string was to get to my link.
One database change is needed and four files need to be slightly modified.