Look at the WebAssist extension Digital File Pro. I believe that may be the solution you are looking for. View the feature tour and see if it handles what you need.
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.