MSCDEX.EXE is the program used to make your CD-ROM avaliable to DOS. his line goes into your AUTOEXEC.BAT file. The command format is as follows : [drive:][path]mscdex [/M:n][/E][/V][/L:drive_letter] where /D:device_name specifies a name for the device driver. This name must be identical to the device_name used in the CONFIG.SYS file. /M:n specifies the number of buffers to be used to cache the CD-ROM disc. Typically, each drive should have a minimum of 4 to 5 buffers. The larger this number, the less your PC will have to read directly from the CD-ROM drive. The recommended value is 15. /E tells MSCDEX.EXE to use expanded memory if your system has expanded memory available. /V specify this switch if you wish to display information about memory usage. /L:drive_letter specifies the letter you wish to assign to the first CD-ROM drive. The default is the next drive letter available. Example- C:\SBPRO\DRV\MSCDEX /V /E /D:MSCD001 /M:15 /L:D I M P O R T A N T N O T E S : What version of DOS you have will determine what version of MSCDEX you need. If you have MS-DOS v6.0, use the version that was included. It is located in your C:\DOS directory. If you have MS-DOS v5.0 or earlier, you need MSCDEX v2.21, the version in this archive. Follow the above instructions to install it. If you are not using MS-DOS, such as DR-DOS, IBM DOS, or Novell DOS, contact their tech support and find out what driver you should be using that is comparable to MSCDEX.EXE. ****** End of README.TXT ******