Design tab? Edit design interface?
I see no design tab. And there is no "design interface" in the edit menu.
I opened up the CSS and it appears to style the entire menu and not allow individual entries. I am not capable of editing Javascript code. I suppose I can edit the HTML and place my graphics that way, but I don't see where to do the rollovers. And I'm not sure I have properly defined the size of the CSS holdout for the graphics.