DotNetNuke Ecommerce

I'm starting up several e-commerce sites and am looking for help setting up the infrastructure and implementing a shopping cart. I've been looking a lot at setting up the new environment with DotNetNuke and [login to view URL] for hosting. Once the infrastructure is set up, it will be used for all of the e-commerce sites. I'll need help with choosing a shopping cart and then loading onto the server. A shopping cart very similar to the Yahoo Stores shopping cart would be great. Once the environment is ready to go, I'll need help with creating or finding skins to suit the product line and completing the individual sites. I'd like to use SQL Server for the database.