The Guide shows you Step-by-Step How to Create a New Item App Launcher into the Applications Main Menu on Linux Xfce Desktop for Linux Lite Distro.
To Make the whole Process Easier to Grasp and Visualize the Post Includes the Basic Screenshots of the Steps Involved.
The Contents and Details are Expressly Essentials to Give Focus Only to the Essentials Instructions and Commands.
Open a Terminal Window
(Press “Enter” to Execute Commands) 
Start GUI Launcher Creator
gksu -l 'exo-desktop-item-edit --create-new /usr/share/applications'
This Command Create a Launcher into the Default Launchers Directory: /usr/share/applications.
Set the Launcher Icon
Click on “no icon”.
Try to Search the Icon between the Defaults One.
Now if you Do Not Find it and Need Help to Locating the Icon Look:
Inserts at Least Name and Command
Click On Create.
Set Properly the Application Category:
Launcher Successfully Inserted into Proper Category on Applications Menu 
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