I think everything he has there like "shoot the messenger" is stand alone" software and it's just the one file you download so it is easy to find out because it either works or does not work. If it does not work then delete the file.
The freestuff is here
http://www.grc.com/freepopular.htm They each have a homepage that each will have more info.
http://www.grc.com/stm/ShootTheMessenger.htm
Says...
Shoot The Messenger allows any Windows
NT/2000/XP user to easily stop and disable
the unnecessary Messenger Service running
in their machines.
But also says at the bottom of the page...
Last Edit: Dec 17, 2005 at 16:24 (766.20 days ago)
So it may or may not work because he needs to update his page or pages.