Port addressing in Win 2K

I am running a NAT on Windows 2K Adv Server.
My question is:
How on earth do I forward a range of ports rather than one at a time??
The NAT in Win 2K only allows one input at a time rather than a range.
I need to forward 1000 ports.
There has got to be an easier way!!!
Any help would be greatly appreciated!

Orlando