How do I add a name to a launcher?

Hi the most basic *.desktop file you could create would be:

[Desktop Entry]
Name=eclipse
Type=Application
Exec=/opt/eclipse/eclipse
Icon=/opt/eclipse/icon.xpm

This is an example I use for eclipse. I created it like this

sudo nano /usr/share/applications/eclipse.desktop

After that you have to make it executable with

sudo chmod +x /usr/share/applications/eclipse.desktop 

Than if you want to add it to the launcher just execute it (navigate to /usr/share/applications/ and double click eclipse) and right click on the icon in the laucher and select "Keep In Laucher"
The application will now also be displayed when you search for applications in the application lens.