Gravis AIL 32 Sound Drivers v1.1 for use with IndyCar Racing v1.02 and above Contains: gravis.txt setupicr.bat runicr.bat gusmid32.dll gusdig32.dll loadpats.exe icr.ini How to use it: Run "setupicr", then set your sound options to Sound Blaster using the "install" program, then to run IndyCar Racing each time, use "runicr". How it works: The loadpats.exe program uses the patch numbers in icr.ini to load the correct patches into the Gravis UltraSound. The new .dll files replace your Sound Blaster .dll files. The .bat files perform these tasks automatically.