OK, so VeX, you are getting a SB version of "4.16". Nicht is getting "2.01", which is WinXP's emulation (SBPro 2). Neither XP nor VDMSound have version "4.16" so what you're talking to via "debug" is actually a "real" SB (the version corresponds to an AWE, which is what I think you said you put in your system).
If you don't believe me then start playing something in Winamp/Media player in the background, then redo the "debug" exercise (namely the part with "o 206,1" "o 206,0" which effectively resets the SB) -- you will probably notice right away that your music stops, and your computer may even crash (!) depending on how well the sound driver takes it.
So now it's just a question of identifying which .SYS file (or Service in Device Manager) is doing this to your system.
Get the list fo services from Device Manager (you should be able to copy/paste it all), and try to think of any software that you or someone else may have installed on your system that would have needed to talk directly to your hardware.
V.