title: If I already have a database, what PHP cart can implement it easily?
body: <p>At an internship, I am tasked with setting up whatever PHP shopping cart me and my co workers think is best.  I installed Magento, and it looks really nice, but it develops its own MySQL database.  That's not necessarily a bad thing, but my job already invested a lot of time in implementing a system that automatically synchronizes a MySQL database with Quickbooks data.  That database already has 1300+ items in it and is ready to go.  Magento forums are saying that Magento is really stuck to it's own database.</p>
  
  <p>Is there a solution to this?  Can Magento Community be modified so it works with a database already in place?  Or is there another PHP MySQL shopping cart out there that can work with item/customer database that's already in place?</p>