When using the WDM drivers, Windows itself will emulate a Sound Blaster Pro. Nothing needs to be done and nothing special will show up in Device Manager.
SB16 emulation requires the .vxd driver set. Additionally, a change to the registry is needed and the driver needs to be installed twice.
The Creative inf files do not install SB16.inf and can’t correctly install it by any method until you add an entry to the registry.