This is a flash BIOS update. The .exe file should be saved to your hard disk and executed. It will prompt you for a floppy diskette. Follow the on-screen instructions and extract the files, creating a bootable diskette.
Insert a blank, formatted diskette and execute the downloaded file with the diskette drive letter as the argument (e.g. driver.exe a:). The system will prompt you for a formatted diskette and will extract the diskette images to the diskettes.
Follow the instructions in the readme file provided with the BIOS for installation.