The orderID is stored in the details to relate it to the order.
You can have whatever columns you want in the order and order details columns. You will have the option to insert into them in the checkout wizard when using a local checkout solution.
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.