How do you add to context menu "Open as Read Only" in Windows 7/Vista for docx, doc, xls, etc

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http://serverfault.com – Microsoft word has a built-in way to open files as Read only from context menu. If you Shift+RightClick you get an option but it doesn't work. If you look online for this you will find a lot of ways for Windows XP to fix the Shift right click (Link) context menu option. But for windows 7, I couldn't find anything. (HowTos)