Hi, I'm not exactly sure about sitesell, but I do know of another store program you could look into. It's called Storefront (
http://www.storefront.net) by Lagarde. It is a shopping cart system that you can customize, and is so reliable. I've used it myself for 1 year and it's really nice, but now my store (
http://eistore.com) has become so popualar, I have to move to a custom design. Storefront has been very relaible and they have great customer service. Hope this helps.
-Brian