Zen Cart Google Checkout payment module is designed to be used with Zen Cart and Google Checkout Payment system. After installing you receive Google Checkout button under your store checkout button, as recommended by Google. We HIGHLY RECOMMEND you to add this payment method to your store. Customers love Google - they will love your store! This package contains all files needed plus an updated readme file with installation notes. This module uses Google Checkout API, Level 1. How module is working Module is passing shipping costs to Google Checkout, product attributes price is included in products price. Taxes are also passed to Google Checkout(i.e. supported). Current functionality work for 99% of osCommerce stores.