The reg worked fine. As I expected though, the second Preview item was not added to the context menu.
Preview replaces Open ...
'Open with' has Windows Photo Viewer, so what I want will require a few more keys.
What I'm trying to end up with is a Context menu that has both Open and Preview, not Open or Preview
OpenI want to keep the Open pick (ex: Paint or Gimp) and have the Preview pick for a quick look-see or visually navigate pictures in a folder.
I'll keep digging but again this is not high priority, more of a skunkworks project in spare time.