I use VDMSound
Its an emulator of everything u could possibly need for dos based games to run under windows. Its easy to config. when u have the GUI launcher (just point and click). It emulates Sound Blaster Cards and all midi cards as well as mouse, ram (expanded and extended) and video memory.
Works perfectly with Dark Forces.
get it at
http://vdmsound.sourceforge.net/)
To get sound and mouse working under win98/me i suggest you check out some sites regardign editing your autoexec.bat files and dos drivers for your mouse and sound if you want it to work (or just upgrade crappy ol win98/me to win2k).
Alternatively there may be similar emultors which work in win98.
Cheers :band: