You wrote: "...there is no moving My Documents."
That article pertains to moving/renaming the Documents & Settings folder and not My Documents folder.
If your intention is to relocate My Documents folder from the C Drive to another drive/partition that is not a problem.
Simply right-click My Documents icon on your Desktop | Properties | Move.
Then browse to any other drive on your PC to relocate My Documents to.
I have been using this method for several years.
It allows me to safely store all my files on a separate drive away from the C Drive.
I can then format the C Drive and reinstall XP without touching My Documents.
But this does not eliminate the need to back up as the HDD can fail anytime.