Yep, I just noticed that too. However, if you Google "FileUtils.rb", one of them should work.
I was looking to see if the script could be modified to just output a file instead of moving files around.
However, it uses / traps the error message "No such file or directory - " to determine which resource
is being loaded.
It looks like Pidey is still active, try a PM to see if a certain version of "FileUtils.rb" is required, and let
him/her know that the link is broken.
I'm going to give this a try when I have some more time. It's a very clever idea, and could certainly save
a bunch of game-makers a lot of time.
Be Well