If someone wants to use it with Windows 9x, then you need to make a boot menu it seems so that certain files only load in DOS.
SBEMU Windows 9x Driver installer (with config text example): https://archive.org/details/sbemu-windows-9x-setup
There are many computers with Windows 9x audio and video drivers, but without DOS audio support (Sound Blaster etc).
This driver changes that and makes many such machines better retro machines :-D
So I agree its useful for people using Win9x even thou it doesn't work in Win9x!
Also what can be done with access to so much CPU power in DOS gaming?
DOS gaming with software video mode in 4k with OPL3 (emulated) sound on a 5ghz CPU? hehe :-P