To create the "qgvdial.desktop" application launcher file do the following;

1) Open "X Terminal" application.
2) Issue command "sudo gainroot" to switch to "root" user.
3) Issue command to edit "qgvdial.desktop" file;

vim /usr/share/applications/hildon/qgvdial.desktop

4) Add the following lines to the file, and save:

[Desktop Entry]
Encoding=UTF-8
Type=Application
Name=qgvdial
Exec=/opt/qgvdial/bin/qgvdial
Icon=/usr/share/icons/hicolor/80x80/apps/qgvdial80.png
Terminal=false

The application now shows up in the master apps list. Now you can create a Desktop short-cut icon from it.

Alternatively, the lines could be created on an external text editor, stored to the N900 "Documents" directory in "File manager" in some folder. At this point you could then use "X Terminal" application and then enter "root" terminal mode as above. Now copy the file from the "File manager" saved location to the "/usr/share/applications/hildon/" location.