Not quite sure what's going on here can anyone suggest anything?
Added a load of drivers to subfolders of $OEM$\$1\drivers\
Added to my sysprep.inf the following:
OemPnPDriversPath=Drivers\Audio;Drivers\Card;Drive rs\Chipset;Drivers\Graphics;Drivers\Modem;Drivers\ NIC;Drivers\WLAN
Install a sysprep'd image onto a system, and it runs through the mini-setup,
but does not seem to install the drivers.
Post install I can browse for the driver in the correct folder e.g.
c:\drivers\Audio and it installs fine just not automatically.
The HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion DevicePath contains the
existing Dell paths, and does not exceed 1,023 (it only contains 218)
characters.
Even if I enable the 'scan for pnp devices' sysprep switch which I only need
for old hardware? it still does not install the drivers.
Ok, I already knew that the entry in sysprep.inf gets written to the
registry, but I think I have found out that this happens when you run
sysprep.exe not during deployment, can someone clarify this please?
Is there a way I can edit the registry by mounting the iamge in WAIK\ImageX
to save re-doing the image?
OemPnPDriversPath not working? 
Linear Mode
