the Custome Folder tweak in the Registry Guide is just the basic representation of what can be done in the shell program Windows Explorer.
It gives the basic registry entries that allow an object to be defined that points to a node in the file directory name space, is protected against deletion and has its own icon.
Note that while it points to a file directory node, itself it is not an object of the file directory tree, so those items are missing in its context menu. And as we are defining a new object, the shell has no clue as what we intend to represent, so it has no Properties entry in the context menu. As for the associated Properties dialog, this cannot just be defined but requires some programming to be done. And if your new object would have some special functionality, you would have to program that first, and then you can bind that functionality to new entries in the context menu.
MS technical documentatin starts at:
<a target="_blank" href=http://msdn.microsoft.com/library/en-us/shellcc/platform/Shell/shell_intro.asp?frame=true>http://msdn.microsoft.com/library/en-us/shellcc/platform/Shell/shell_intro.asp?frame=true</a>
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Regards - Richard