there is a program that you could use called gnome-menu-editor
http://www.gnomefiles.org/app.php?soft_id=867
or you could do it manually, here is how i added limewire
Code:
su
gedit /usr/share/applications/LimeWire.desktop
Insert the following lines into the new file
Code:
[Desktop Entry]
Name=LimeWire
Comment=LimeWire
Exec=runLime.sh
Icon=/opt/LimeWire/LimeWire.ico
Terminal=false
Type=Application
Categories=Application;Network;
then you could refreash the menu by tping killall gnome-panel