Google says most of this stuff is in C:\Windows\system32, such as control panel (%systemroot%\system32\control.exe) But I couldn't find any in there leading directly to System. But Windows Help and Support had a link to System, and viewing the source to the page, revealed this
%25systemroot%25\system32\control.exe /name Microsoft.System
So, I tried this in DX, and it seemed to work:
In the File shortcut field, enter: %systemroot%\system32\control.exe
In the Arguments field below that, enter: /name Microsoft.System
ETA: WinMonster wins that race.