Hey Skittles.... What game are you trying to play??? You may find that Windows 98 SE doesn't require DosBox to be installed...
Try the following:
1. Run the setup.exe or file thats similar and select a sound option like IBM, this works for my computer even though its not a IBM.
2. Run the game... any sound? If not run the setup again and try a different sound option.
If there isn't a setup file or option in the game, then post back with the game and any error messages you may be recieving.
If you get sound for other things - mp3s etc, then im sure its a quick fix for your games also. Though I would have thought you would have heard sound on some games previously when you didn't use DosBox.
Anyways post back your results so the people here can gather whether DosBox would help you.
Heres some links that may be of interest:
Sound Troubles?
Easy DosBox Guide