Need Help: Adding options to pulldown menu

Someone please help me.

I've been fighting with this silly software for a while now and have still not figured out how to add additional options to the pulldown menu Go button (beneath the Sign the Guestbook and Administration links in the upper right corner).

I want to add the other main pages of our web site to it (Home, News, etc) but cannot find where to make any changes to Header, Body or whichever .php object holds this info.

The guestbook can be viewed here:

http://www.piratesofthecurribean.org/guestbook/index.php

Well, not the Go button. That would be silly to add to it.

Add to the pull down menu. *shoos off people who keep bothering her when she's trying to type*