I Got it to work.
But I had to do a full reinstall to do it.
 
What you have to do is go to the I386 folder and find the file "TXTSETUP.SIF". Then edit it using notepad and change the line
"ACPIEnable = 2" to "ACPIEnable = 0".
Make sure you save the file as a *.SIF file and not a *.TXT file or you'll have to reinstall again.
 
After you do that just install the MX300 using the reference NT drivers by hitting the have disc button on the installation wizard.
 
Hope this helps.
Any questions just email me.

I did as u said. Clean install and I did get latest NT4 reference drivers from a3d but when I try to install them Windows tell me that it can't find drivers for this device

You have to let it detect your hardware, or if it's already detected you have to then update the drivers and point it to the reference drivers you downloaded from www.a3d.com.
 
Don't let Windows 2000 do a search you have to select the drivers from a list and hit the have disc button.
 
Windows 2000 build 2072 doesn't have any native support for the vortex cards. I think build 2092 does.

Looks like the problem is solved !!! FINALY BETA drivers for Vortex2 !!!!!!!!