Google Checkout / OsCommerce

I am looking to add google checkout to my web site. ## Deliverables The template that I am using is different then the standard oscommerce template. I would like to have the code modified to work with my template. Items that must work: 1. Posting shopping carts to Google Checkout 2. Shipping support 3. Tax support 4. User and order updates within osCommerce 5. Order processing using osCommerce Admin UI I have the GC level 2 code. ## Platform Level 2 of GC osCommerce 2.2-MS2 PHP Version 4.4.4 Linux infong 2.4 #1 SMP CURL support enabled (libcurl/7.10.3 OpenSSL/0.9.6g ipv6 zlib/1.2.1 )