These Drivers are for STB's S3 based Video Cards The Powergraph X-24, Powergraph VL-24 and Pegasus VL. These are for the Windows NT version 3.5. Unzip the files into a empty directory or a floppy. Choose the Display icon from the control panel. Select change. Select change again from the driver summary. Select other. Enter the Directory/Drive of the floppy and then follow instructions and enter the path to the drivers again. Restart Windows NT and then choose colors, resolution and refresh rate from the Display section of the Control panel. Report any problems to STB Technical Support at (800)234-4334 or (214)234-8750. Or on Compuserve, GO STBSYS, or on our BBS (214)437-9615. These are BETA drivers.