I did it a year ago for my own "My Documents" but I can't remember how! I'ld be surprised if it can't also be done for Shared Documents, provided of course the user had administrator priviliges.
I believe what you are looking for is under the following
registry key:
"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVers
ion\Explorer\Shell Folders"
The following values to be more precise:
Common Documents
CommonMusic
CommonPictures
CommonVideo
-----Original Message-----
I did it a year ago for my own "My Documents" but I