To use these new sound drivers with HardBall 4, simply copy these new
files (drvrlist.bin, hmidet.386, hmidrv.386, hmimdrv.386) into the
directory HB4 is installed in, then run HB4, go to the Sound/Music
setup screen and reselect your sound options.

If you ever re-install HB4, you will then need to re-copy these files into
the HB4 directory.