Going Wireless on a network

Hi,

I’m venturing in to wireless and do need some help. I have a windows network. All my servers are windows 2000’s except I still have a windows nt4.0 as my pdc. I would like for my salesman to go wireless w/there laptops in the building. I believe I would need a wireless card for the laptop an access point. And fuzzy on this one but a wireless adapter card for the PDC?
Any help would be appreciated. Thank You