Hi Carl,
Those are nice links. Thank you. Unfortunately, no joy.
The shortcut points to a .exe on a network drive. It even comes up with its own icon. Directly copying the shortcut into "%AppData%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar" does not work.
I have not tried entering it into "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Taskband". I should check.
-T