You can add additional styles from the advanced customizations area from the html editor interface. You can also edit them by hand. Please search this forum for more examples and details on how that is done.
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.