Fetchback Ads - Set Up Question

[spectreman]

Zen Cart Users,

i have a free trial for a ad group called Fetchback, but in order to get accurate values on the return info, i need to add code to the "success" page.

i'm adding the following code:
<iframe src='http://pixel.fetchback.com/serve/fb/pdj?cat=&name=success&sid=4745&oid=ORDER_ID&crv=CLIENT_REVENUE&purchase_products =PRODUCTID' scrolling='no' width='1' height='1' marginheight='0' marginwidth='0' frameborder='0'></iframe>

to the:
checkout_success/tpl_footer.php

now, my question is, what do i put in the bold areas below so the correct info is pulled from my cart:

<iframe src='http://pixel.fetchback.com/serve/fb/pdj?cat=&name=success&sid=4745&oid=ORDER_ID&crv=CLIENT_REVENUE&purchase_products=PRODUCTID' scrolling='no' width='1' height='1' marginheight='0' marginwidth='0' frameborder='0'></iframe>

does anyone have any insight on this?

thanks!

[barricades]

$orders->fields['orders_id']

the product_id isn't available without a custom query for it (I think) and anyway the order may contain more than one product id

I'm not sure what the client revenue is for? Whats that?