This seems about the best place to post this seeing as the thread "Win9x + VDMSound **ALPHA**" is closed. For anyone still using this on a win98 machine, the Tip of the Day dialogue box that pops up each time you run it is annoying. What I've done here is patch the VDMConfig.dll to immediately return from the subroutine that does all the tip stuff so you no longer get the message. I only use VDMSound on one win98 laptop that has no OPL synth, but works with digital and MIDI music. The few OPL synth games I've tested (e.g. the Commander Keen games and D/Generation) seem to work fine with the new change.

If you'd prefer to patch the VDMConfig.dll file yourself, download and set up win9x VDMSound, open the dll with a hex editor and change the following byte:
0x28F1: 55 -> C3

The pattern from this byte should then change from:
55 8B EC 51 56 57 68 C4 12 01 10 FF 15 40 D0 00
to:
C3 8B EC 51 56 57 68 C4 12 01 10 FF 15 40 D0 00