When you open the My Computer screen and your Documents folder is missing but all the other users folders are there try this tweak.
START > RUN > REGEDIT >
HKEY_LOCAL_MACHINE / Software / Microsoft / Windows / Current Version / Explorer / DocFolderPaths
Once you click the DocFolderPaths folder you should see all the user's folders.
Add a new string value
Value Name: your user name
Value Data: the path to your docs folder ( ex. C:\Documents and Settings\your docs folder )
Exit Registry editor and open my computer, your docs folder should now be visable.
I hope this helps those of you stranded with this problem!