Just a short note about changing menu items in gnome in fedora 16.

The location where the shortcuts are held for everyone is:

/usr/share/applications

You can have user specific menu items, just like windows and this is under the users profile. I believe these are under:

~/.local/share/applications

The application shortcut files are pretty intuitive and look like:

RPMFusion-mythtv-setup.desktop

[Desktop Entry]
Encoding=UTF-8
Name=mythTV setup - DO NOT RUN AS ROOT
Comment=Setup for mythTV.
Icon=mythtv-setup
Exec=mythtv-setup -geometry 1156x650+60+100 -w
Terminal=false
Type=Application
X-Desktop-File-Install-Version=0.18
Categories=AudioVideo;Application;X-Fedora-Extra;