This tool is for running s3d games for old ViRGE on VX/DX/GX/GX2/MX as well as Trio 3D (/2X), Trio may not work in Windows. 1st, Copy the S3DRUN.EXE AND S3DSRVR.EXE to a public directory (i.e. \WINDOWS\COMMAND or \DOS or the games directories ). 2nd, Copy the S3DTKW.DLL to \WINDOWS\SYSTEM directory 3th, At DOS prompt run the TSR file S3DSRVR.EXE then run s3drun with game start file being it's parameter (i.e. for terminal velocity, you used to type TV; now you type S3DRUN TV). Puas vintage3d.org