You might be better off running KQ6 on an emulation layer instead of tweaking it to work with Windows. Check out DOSBOX:
If you’ve got any other old school DOS games, bust them out. I’ve had quite a bit of success playing stuff that is impossible to run under anything besides a native DOS system and an original Soundblaster card. It’s even got a modem over TCP/IP emulation. I was able to play Populous with a friend of mine over the ‘Net using this feature.