How about installing that good old MS-DOS on your machine? It runs just about every DOS-based software I can think of 😁
Seriously, if you really want to use Win98, there's couple of things that might help. When you boot your machine in DOS-mode, type "setver 6.22". That should trick programs thinking your running MS-DOS 6.22. If you still can't install those drivers, there's no need to be desperate: most DOS games use their own sound drivers anyway - you should not need Creative's low lever drivers for gaming.
On the other hand, one thing many old games require is the BLASTER-variable. That's the thing in your AUTOEXEC.BAT saying something like "SET BLASTER=A220 I5 D1 H5 P330 E620 T6". (Since you have Win98 drivers installed, there's a good chance you'd might have that variable already correctly set up, but I'll tell you this anyway...) Getting those numbers right should be easy, if your card is PnP -compatible: download Creative PnP Configuration Manager from their site, uncompress the archive somewhere on your hard drive (i.e. C:\CTCM), and add the following lines in your startup files:
[CONFIG.SYS]
DEVICE=C:\CTCM\CTCM.EXE
[AUTOEXEC.BAT]
SET CTCM=C:\CTCM
The settings can be a little trickier, if your card isn't Pnp compatible... in that case you can obtain the right numbers from Win98's Device Manager.