(re: Internal PC Speaker sound)
Use DosBox. I remember looking for this awhile back, I even asked such people as Ken Silverman (maker of duke3d’s engine..he actually replied 3 times 😀 ) It forces all Internal speaker sounds to come out of your sound card. It works with all 3 channels too.
http://dosbox.sourceforge.net/
If you need help running it just ask.