Are these DOS or Windows games? The methods for getting them to work are quite different.
I don't recommend VDMSound since it has timer glitches that cause FM music to play at variable speeds, and it is basically defunct, with the last update done in something like 2002. The one reason to use it in the past was speed, as Dosbox could be too slow on some games, but the 0.7 versions of Dosbox are very fast on the dynamic core and run everything I've tried flawlessly, including several of the newer protected mode DOS games from the mid 90s (Doom/Descent era).