Except now I have a 32-bit Vista and get a "multiple connection not allow" message when trying to perform an external backup of the drive.
This is Windows design, it won't allow 2 or more connections to one and the same host (share).
If you, for example, have already mapped \\DNS323\volume1\ as a network drive or via network neighbourhood, your backup program can't establish a new connection to the same path.
You can avoid the message if you use the ip instead of the name, \\192.168.0.xx\volume1\ in your backup program (or the other way round).
Windows will recognize this as a different host and establish the connection without error message.
(you have to replace name / ip and share name with the ones you use at home)