Most user will merge register_explorer_menu.reg without reading the content of it!

[ghost]

Most user will double click into register_explorer_menu.reg to merge it into the Registry without reading the content of it so they will never see your comments inside that file. Of course, this will not work. I suggest renaming register_explorer_menu.reg to register_explorer_menu.txt and add another comment line into it like this:

; rename this file to register_explorer_menu.reg before you could merge it into the Registry

Or better yet, you could move the comments into a separate README.txt file.