If I understand your request, you want to add a shorcut to an application that will appear in the Gnome menu under Applications->Internet.
In the future, please post which core you are using (i.e. FC3, FC4, etc.).
Here is a link that describes how to do this
http://www.gnome.org/start/2.0/menuediting.html.
I use FC4 and it works perfectly.
Good luck.