Win NT4.0 SP6 & Diamond video drivers

We installed NT4.0 service pack 6.0 on a computer. I have a diamond stealth 3D 4000 agp video card. I downloaded the drivers for this card and when I go to install it says the drivers are for an older version. Where do I find drivers for NT4.0 service pack 6.0 or can I make the drivers I downloaded work somehow?