rejzor: Yes they have. I've just installed Screamer 2 and you get regular software and 3dfx shortcut icons on desktop.
I've also checked 3dfx version and it is hardware accelerated. It runs butter smooth and whats even more incredible, you can apply anti-aliasing and anisotropic filtering to it since Glide Wrapper is running through Direct3D. I was able to apply 8x anti-aliasing and 16x anisotropic filter through AMD Catalyst Control center and the game looks absolutely fantastic.
If you try it with and without anti-aliasing you'll notice the biggest difference in main menu. No more jagged edges. This has to be one of the best GOG releases to date and brings back my childhood memories back as if they happened yesterday. I've beat the Championship back then and i'll do it again! Now in HD (so to speak) :D
Brilliant - sounds about as good as we could hope for ! thanks for the info.