How do you use S3TC textures in Unreal Tourney?

[Pakman]

Hey all, I was wondering how to enable this feature on a Geforce 2 GTS card? I know Microsoft incorporates this into it's DirectX, but how do you enable it in the game? I've installed UT and also installed the textures from the second CD. I've also applied the latest patch and I'm using Det 3 drivers from Nvidia.