Marketpress Page Locations

Hi

I'm using the Marketpress plugin, but I don't understand how the store url slugs are working. When I installed the plugin it auto created the store page with slug /store/. When I add the store page to my menu system it auto creates 3 sub menus: 1) products 2) shopping cart 3) order status. I want to access the physical pages to edit the template used, but if I create these pages as sub pages under store with the correct slugs as per my presentation settings, the sub menu items direct to the slugs that I've specified, but it does not display the content on the pages I created?