I talked to NI about this issue, and tried the following WITH success (note that I am running W2k and Labview 6.0.2):
1. Uninstall all NI components in the reverse order you installed them. For me, this was Ni-Daq, Ni-488.2, and finally Labview 6.0. If you have to, look at the modified or created dates of the folders to see what order you did it in.
2. After this, I decided to go a bit further and delete the registry key for Ni-Daq under HKEY_LOCAL_MACHINE\SOFTWARE\National Instruments\NI-DAQ. Make sure you Export your registry key beforehand in case something goes wrong.
3. Install Labview 6.0, custom installation. For this installation, DO NOT INSTALL the drivers, just Labview.
4. After that, I installed the upgrade patch for Labview 6i -> 6.0.2, downloaded at ni.com.
5. Next I downloaded the 2 files for NI-DAQ 6.9.3, uncompressed the files, and ran the setup. When the installation was done, I chose to not reboot now, but let me do it later. At one of these points, you can also Mass compile the VI's. I don't think it's necessary at this point, but I did it anyway.
6. Finally, I downloaded NI-488.2 version 2.2 (which has a new version of MAX than NI-DAQ 6.9.3), uncompressed it and installed it.
7. After this last step, I rebooted the computer and was able to finally get into MAX to configure my DAQ card.
So far, this method has worked. Perhaps it can work for you.