Starting with version 2.3.5, AT-FBUS board could run FBUS on Windows 2000.
And since version 2.3.6(release date is April of 2002), PCMCIA-FBUS interface could run FBUS on Windows 2000.
In general, after NI-FBUS 2.3.6, all the interface including AT-FBUS and PCMCIA-FBUS are able to support Windows 2000/XP.