Google Base Tracking and froogle-base file

[johnbiggscr]

So we want to detemrine which visits to the site come from google/organic and which come from google base.

I found a guide that suggested simply adding ?utm_source=google&utm_medium=base&utm_campaign=products to the end of each link.
The issue is that Shopsite links in the froogle-base file have a #<number> on the end:

<link rel='alternate' type='text/html' href='http://www.awebsitename.com/myhtmlfile.html#3639'/>

And no matter where I put the suggested tracking code in that link, google merchant center comes back with a feed error.

Anyone else used this tracking method before and know what the actual format should be?