Thanks for the quick response.
My thought was to use my database and website to showcase the catalog of products, and then when an item is clicked for purchase, I send a set of data to a simple shopping cart plug-in.
I have one right now that we are using, MOFCart, but it is in cgi, so I don't have access to certain things that I want to tweak. I was wondering if the same kind of thing as MOFCart is available in a php based app?