How can I configure extra Plug and Play drivers for a Windows 2000 installation?

Move to your I386 structure and create a subdirectory $OEM$$1

Under the $1 directory create a directory of no more than 8 characters of the company who make the driver, e.g. creative

Under that directory create a subdirectory for the type of hardware, e.g. video, sound etc. (again no more than 8 characters)
At this point you might have structure:
- d:i386$OEM$$1creativevideo
- d:i386$OEM$$1creativeaudio

Copy the drivers and the .INF files into the appropriate subfolder

Open you answer file (or your SIF file) and add the directories to the OEMPnPDriversPath under the [Unattended] section, e.g.

[Unattended]
    OEMPnPDriversPath = "creativevideo;creativeaudio"

Use a semi-colon (;) to separate the entries

If any of the drivers are unsigned it will interrupt the unattended installation so also add the line

DriverSigningPolicy = Ignore

Under the OemPnPdriversPath line