How do I edit the menus in the panel?

First you have to install the menu editor:

1. Open a Terminal.
2. Become root:
   su -
3. Install the menu editor:
   yum install alacarte

Now you can go to the System menu, then "Preferences", and click on "Main Menu" to edit the menu.

For KDE users, there is a program called kmenuedit that you can run to edit the menu.