I know its possible with ACS but is it possible to use windows 2000 active directory to authenticate MAC addresses?

In our facility we are using Aironet 350 AP's, Fujitsu 3400 Pentablets with cisco 350 cards and Symbol 1846 handheld devices. The access points connect up to HP Procurve 4000 switch that then connect to Cabletron 8200 SSR's. The problems we are havin...