Dear Customer! We are specializing in e-commerce web site development and have great experience in shopping cart integration. We have worked with many shopping carts using OS Commerce, CRE Loaded, Drupal, Zen Cart, Virtue mart etc. and also develop shopping carts from scratch in PHP and ASP.NET. Please, see links to our works on PMB. We place a preliminary bid and invite you to provide more details on your project so that it is possible to understand the scope of work more exactly. From our part, we will be glad to answer your questions. Kind regards, Siku, Mindurge