Install the latest 3dfx reference drivers. Then override the glide2x.dll and 
3dfx32v2.dll in the Windows system directory with the patched versions from 
this package. This new version will allow you to run ANY application (D3D, OpenGL
and Glide) on SLI configuration with voodoo2 boards from different manufacturers. 
Note that this kind of SLI mix has some potential unsafety being caused by possible 
differences in board architectures I'm not aware of. So this binary is supplied as-is.
It is your responsibility to decide whether to use it or not.
     Regards, Andrei Osnovich. 