make a .bat command that will launch
Quake2 and set these varialbes
SET SST_GRXCLK=57 <------this is the overclocking variable for 3Dfx cards, 50 is factory default, anything above 57 could be risky.
quake2.exe %1 %2 %3 %4 %5 %6 %7 %8 %9
If you get the 'out of environment space'
error, add this line to your config.sys and reboot and start your Quake2 .bat
shell=c:\command.com /e:512 /p