Video and Audio Drivers do no install during the unattended install

[timothyj]

We have multiple HP models that we deploy in our office. I am trying to add audio and video drivers to an existing RIS image. The drivers for RIS are added to the $OEM$\$1\PnPDrvrs\Media\SndMax and $OEM$\$1\PnPDrvrs\System\Graphics respectively. Those paths are added to the [unattended] section as shown below:

OemPreinstall = yes

OemPnPDriversPath = "PnPDrvrs\Network\PRO100;PnPDrvrs\Network\PRO1000;PnPDrvrs\Network\BRCM;PnPDrvrs\Network\NIC;PnPDrvrs\Display\Intel;PnPDrvrs\Media\SndMax;PnPDrvrs\Media\SMax;PnPDrvrs\Media\WDM;PnPDrvrs\Media\SMAXWDM;PnPDrvrs\System\Chipsets;PnPDrvrs\System\Graphics;PnPDrvrs\System\HECI;PnPDrvrs\System\Intel"

When the image is deployed, all works with the audio and video devices uninstalled. I can manually install the devices pointing to the respective PnPDrvrs subfolders and the devices install fine. What am I doing wrong that the unattended installation is not installing the drivers?

riprep.sif