Yes of course, you have just to create .desktop file in:
/usr/share/applications/hildon/

You can use other .desktop files as a model with:
[Desktop Entry]
Name=name_of_the_script
GenericName=name_of_the_script
Exec=/path/to/your_script.sh
Icon=/path/to/icon
Terminal=true
Type=Application
X-Osso-Type=application/x-executable

That's it.