Probably need a bit more detail from you on your setup as to wifi vendor, if the controller will be the authenticator, etc. Couldn't see the guide you mentioned attached or hyperlinked?
Maybe have a read at this: http://community.arubanetworks.com/aruba/attachments/aruba/115/6113/1/Using+Microsoft+Windows+2008+Server+With+Aruba.pdf
Client MAC auth should be phased out due to MAC spoofing (exceptions would be for devices that don't support 802.1X).
Cheers