Can someone explain the code to put the symlink pointing to /mnt/hdaX/documents from knoppix/home/user and fedora/home/user for us newbies?
You can do it in your desktop by right clicking-->create new-->file-->link to location(url).
Select your location ex: /mnt/hdaX/documents/

Make sure your /etc/fstab has something like this:
/dev/hdax /mnt/hdax ext2(or ext3 or reseirfs,depends on your fedora) auto,users,exec,umask=000,quiet 0 0

or it will not auto mount.