The MANUAL way to change display type WITHOUT needing to install.

     In all cases below, you must have diskettes 6-15 (diskettes installed under PM - may be different depending on driver level). When the instructions say:
     'UNPACK A:filename targetdrive:', this implies that this command is run against each of the diskettes as the file may reside on any or all of the diskettes.

     For CGA:

       1.UNPACK A:CGA targetdrive:
       2.copy (or rename) the file \OS2\DLL\CGA.DLL to \OS2\DLL\DISPLAY.DLL
       3.change the CONFIG.SYS
          SET VIDEO_DEVICES=VIO_CGA
          SET VIO_CGA=DEVICE(BVHCGA)
          remove any reference to DEVINFO=KDB,xxx,xxxxx

     For EGA:

       1.UNPACK A:EGA targetdrive:
       2.copy (or rename) the file \OS2\DLL\EGA.DLL to \OS2\DLL\DISPLAY.DLL
       3.change the CONFIG.SYS
          SET VIDEO_DEVICES=VIO_EGA
          SET VIO_EGA=DEVICE(BVHEGA)
          DEVINFO=KDB,EGA,xxxxx

     For VGA:

       1.UNPACK A:VGA targetdrive:
       2.copy (or rename) the file \OS2\DLL\VGA.DLL to \OS2\DLL\DISPLAY.DLL
       3.change the CONFIG.SYS
          SET VIDEO_DEVICES=VIO_VGA
          SET VIO_VGA=DEVICE(BVHVGA)
          DEVINFO=KDB,VGA,xxxxx

     For 8514:

       1.UNPACK A:8514 targetdrive:
       2.copy (or rename) the file \OS2\DLL\8514.DLL to \OS2\DLL\DISPLAY.DLL
       3.change the CONFIG.SYS
          SET VIDEO_DEVICES=VIO_8514
          SET VIO_8514=DEVICE(BVHVGA,BVH8514)
          DEVINFO=KDB,BGA,xxxxx

     For XGA:

       1.UNPACK A:XGA targetdrive:
       2.copy (or rename) the file \OS2\DLL\XGA.DLL to \OS2\DLL\DISPLAY.DLL
       3.change the CONFIG.SYS
          SET VIDEO_DEVICES=VIO_XGA
          SET VIO_XGA=DEVICE(BVHVGA,BVHXGA)
          DEVICE=targetdrive:\OS2\XGARING0.SYS
          DEVINFO=KDB,VGA,xxxxx

     Where xxxxx = targetdrive:\OS2\VIOTBL.DCP

     This does not cover dual display systems, those get somewhat more involved.

     This also does not cover changing the OS2.INI file, but since these are changes to colors and must be done programmatically, it is not usually worth the
     effort.