Small Internet Explorer Plugins
If you have installed Windows to a location other than C:\Windows you must edit the .reg files before double-clicking them. You'll need a text editor that understands UNICODE for at least one of the reg files. Use Notepad if in doubt.
I made imglcopy while Ben Joyce made the other two.
Update 22/Dec/2009: The iemailquote .reg file wasn't seen as valid, at least on modern versions of Windows, but it's been replaced with a correct version.