Anisotropic Filtering settings on GeForce 3 Ti200 card?

What should I set this to in properties for the video card? I don't wish to repeat what FS is also doing, although I don't see a setting for this in FS2002 (video card settings)? Settings available are 2*, 4* or 8* (and off).I did raed somewhere here that checking "texture sharpening" is not required as it already is happening in FS.Thanks,Bruce.