Hi:
Regarding your questions:
1) Yep, many times. There's unfortunately no easy way to extend the menu with additional levels, which is true for most of the single level DHTML menus here on DD. It's one of those things on my to-do's.
2) Do you mean center the menu bar relative to the page? Inside the .css for the script near the very top, find and edit the below:
Code:
.chromestyle{
width: 600px;
margin-left: autp;
margin-right: auto;
font-weight: bold;
}
Code in red is new. This should center the menu (and give it a width of 600px).
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