If you want to integrate that, don't try to integrate with the current module. Instead, add the tracking code with the proper qualifiers to the tpl_main_page.php. You'll need to use the "if this page is the checkout success page" type of if then statement (you'll find this in the Google code or in my previous posts.)
If you add that, then customize what AdCenter provides you with, it works like a charm.
Let me know if this helps.
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