I'm having epic failure ever since I installed the google checkout module.

My store is at https://shop.allgames.com

Whenever anything is selected i get

Fatal error: Cannot redeclare compare() (previously declared in /home/.bedrock/allgames/shop.allgames.com/includes/functions/extra_functions/added_function_for_google_checkout.php:345) in /home/.bedrock/allgames/shop.allgames.com/googlecheckout/gcheckout.php on line 417

Im not sure what I've done, i tweaked the files as mentioned in the install doc.