Windows – Add menu items to SHIFT + right click menu on Windows

The point is to add right click menu items only for Shift+Right click. Don't even bother: regular right click is all over the web, but I want to add some items that wouldn't clutter my right click.

Here's how to add "Open Command Window Here" for right click menu. What do I need to modify to add it only to Shift+Right click?

Windows Registry Editor Version 5.00
[HKEY_CLASSES_ROOT\Directory\shell\CommandPrompt]
@="Open Command Window Here"
[HKEY_CLASSES_ROOT\Directory\shell\CommandPrompt\command]
@="cmd.exe /k pushd %L"

(Yes, I know, that's exactly what win7 does).