You will not be able to use Dynamic Dropdowns to accomplish this. You would need to create javascript code to display the additional information in the text boxes, we do not have an extesnion to assist you in this.
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.