Is it possible to play this in windowed mode? The game likes to change resolutions between game and the menu and it takes long time for my monitor to change resolutions for some reason (black screen for about 10 seconds) so it can be frustrating to get the controls and video settings right.

Also the nglide_config doesn't seem to change the resolution. I set it to 1920x1080 but it's still the 1024xsomething in game on both 3dfx and D3D.

If you are using nglide then I don't believe that there is a windowed mode option for it. dgVoodoo, an alternative 3dfx wrapper, does offer a windowed mode, though, so maybe you could get the game running using dgVoodoo instead?

As for the resolution issue, we'd need to see some screenshots so that we can see what you see. nglide forces the screen resolution for the game to use, but the in-game settings will not reference this resolution and should be left alone.