Gigabit Ethernet Server Adapters

I am being said that I need Windows 2000 Advanced Server in order to install 2 or more Intel PRO/1000 XT Server Adapters using Adaptive Load Balancing. We used to do this with Windows NT 4.0 without any problem. We recently decided to migrate to Windows 2000 Server but we do not want to upgrade to Win 2000 Advance Server. We have nbot yet found product information to help us to deal with this issue. We would appreciate your help on this regard.
Thanks