To install the Sound Blaster Plug N Play drivers, first remove all Audio Devices from Control Panel / Multimedia. Reboot.
If PnPIsa is not installed (Control Panel / Devices), install it by right clicking the Drvlib\Pnpisa\x86\Pnpisa.inf file from the NT CD-ROM and pick install. Reboot.
If SP3 (or greater) is not yet installed, install it.
If you are going to install the drivers from Creative Labs, expand SP3 (nt4sp3_i.exe /x) into a temporary directory, switch to that directory, and type devpre devupd.inf. When prompted, enter the path to the Create Lab drivers.
To install the Microsoft drivers instead, respond to the New Hardware Found message by clicking Driver from disk provided by hardware manufacturer in the Select Device box. Enter drvlib\audio\sbpnp\x86 and click OK.
If you are prompted for a driver for the Creative Labs 3D Stereo Enhancement Technology device, click Windows NT Default Driver, and then click OK.
If you are prompted for a driver for the IDE CD-ROM (ATAPI 1.2) /Standard IDE/ESDI Hard Disk Controller device, click Do not install a driver (Windows NT will not prompt you again).
If you are prompted for a driver for the Microsoft Joystick Port Enabler device, click Windows NT Default Driver, and then click OK.
NOTE: If this choice is not available, click Driver from disk provided by hardware manufacturer and type <cdrom>:\drvlib\audio\sbpnp\i386.