This contribution will add a full support of a Google Checkout service to your OscMax store. While using Google checkout at your OscMax store you will be able to allow your customers to buy from you quickly and securely, using a single username and password without any account creation. Benefits: * Google Checkout for OscMax will run on any PHP4 or PHP5 enabled web-server * No requirements for using libXML and libCURL installed. * Full google checkout sandbox support * Full shipping support using merchant-calculations google checkout shipping * Full tax support over merchant-calculations in google checkout using taxes from OscMax * Basic shipping modules like flat-rate and per-item shipping supported * Basic USA shipping modules: UPS, USPS, FEDEX with real-time quotes are supported * Order management inside OscMax Administration area: orders placed via Google Checkout will appear in your OscMax admin, and you will be able to process them (Charge, Refund, Ship, Track etc) from your usual OscMax orders page