Shop-Script PREMIUM is turnkey ecommerce shopping cart software with all Shop-Script PRO features plus exclusive advantages such as: - Integrated with Google Checkout - Support for complex (configurable) products - Affiliate program marketing tool - Advanced product search tools (search by custom parameters) - Order SMS-notifications - Integrated with Google Analytics - Support for non tangible downloadable products - Products picture galleries - Export products to Google Base - Link Exchange tools - plus many more ecommerce features… see the full list at: http://www.shop-script.com/php-shopping-cart-software-3-features.html Provided in fully open source code, Shop-Script PREMIUM is extremely flexible - you can freely customize it to meet your demands. However, if you are not an advanced user and do not wish to customize the software, you do not have to - we designed Shop-Script PREMIUM such that is can be managed and installed by anyone who can use a web browser.