ok finally i have find one solution, and one website is very useful to understand this: http://www.frankrock74.it/frankrock74/?p=1738
i do something like this:
open alacarte and made my personal menu "Script" as an empty menu.I can put this in any menu but i choose Application.
Now i create my personal .desktop file as is for example.:
Now is important to made one modification inside a file:
Terminal: gedit ~/.config/menus/applications.menu
in this file is possible to view the desktop directories created with alacarte,
this second voice is the menù i have created "Script"
to make the launchers functionally inside this desktop.directory
is necessary to add this line after the upper voice.
A directive to the menu to include our category
in finally we have somthing like this:
NOw saved and finally any my.desktop files i put inside the folder:
is recognized in my personal menù and works well.
Is a good choice to read this web site to understanding desktop directories:
hoping my english is comprensible.