SGI Version
Initially, I did not do a version that uses the SGI OpenGL. I didn't see any advantage on my development system. Since, I have tested the SGI version on other slower systems and have seen as much as a 20% gain in performance.
The SGI version must be download separately, I have included the SGI OpenGL dlls. The executable file is SGI_QSB.exe. Place all of the files from the downloaded zip in their own directory.
Another reason for using the SGI version is to defeat some of the accelerated video cards whose OpenGL drivers are buggy, or incomplete. SGI OpenGl will normally get out of the way of accelerated video cards, but there is a way to force it in even with an accelerated video card. The file sgiqsb.bat does just that, so if you are having problems with QSB and suspect your video card, try running sgiqsb.bat