i think I came across this question before.
I am sure it is just a case of altering the menu.php and setting an inline style with a negative left margin.
--At least, that's how to do it using CSS menu builder--
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.