OK, I finally got the drivers to work My failure was in following the instructions mentioned earlier, specifically to ignore the Windows "found hardware" dialog.
Here's what did not work: Uninstall the drivers, reboot, install drivers, reboot (using the old drivers that came on the CDROM, or the drivers downloaded from this web site). I would either get the "found new hardware" dialog box when starting, or the PVS application would not behave properly, or some other failure. I tried this perhaps a dozen times. It always failed.
Here's what did work: install the drivers downloaded from this site, open the device manager, and observe one driver that did not install properly - right click on it, selected "reinstall" or "upgrade driver" (don't remember which), and following the Windows hardware installation dialogs that followed, reinstalled using the drivers previously downloaded - after this, everything worked fine.
So thanks for some advice - you might want to update your FAQ page.