Instead of adding up google and yahoo conversion codes on my thank you page, is there a way to use a common script installed in the thank you page? Take a look at this site http://fatloss4idiots.com/aff/tracking.html. I'm trying to figure out how to program such php code. The advantage would be, there is no need for the affiliate to contact the merchant to install his script on the thank you page, instead just use the kind of URL shown in the above site. Hope the question is understandable. Thanks in advance