yes, you would edit the menu.css file. Most likely the ul#cssmw > li > a element.
depending on which method you choose, you may also need to add div elements around the menu.
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.