Hi Amba,

Thank you for your message.
If you want to bypass our ecommerce module with your external products, I'm afraid that you will have to clone and modify our default ecommerce webparts in order to achieve your aims. You could use approach described in DevGuide article displaying_data_from_external_database

Please see how the products are managed in KenticoCMS: http://www.kentico.com/docs/ecommerceguide/products.htm. You could import the products into our system for example according to this approach: http://devnet.kentico.com/Knowledge-Base/E-commerce/Products-import-from-external-source.aspx
These products have to be in our database. If you would like to have the products records in your external database you would need to ensure this functionality by yourself with the help of custom providers (http://www.kentico.com/docs/ecommerceguide/overview10.htm, CustomSKUInfoProvider...). One way or another, you would need to save the data in both places...

Regards,
Zdenek C.