RIS CD Image and drivers for multiple hardware types

Hi,

XPSP2 flat CD image that I would like to use for mulitple installations. We
have 5 distinct types of workstations / laptops with different drivers for
video, audio, etc. I've created an $oem$\$1\Drivers structure and populated
the subdirectories with the necessary drivers. All works well for the
hardware type specific to those drivers.

I created a 2nd .sif file for another hardware type (MPC laptops) and put it
in the i386/Templates folder, created a separate subdirectory under Drivers
("MPC") and populated that folder w/ the MPC-specific drivers. On a custom
installation, the MPC laptop connected w/o issue to the "image" that the sif
file controls and did a remote installation but downloaded the whole
"drivers" folder (including the MPC subdir) to the laptop's C: drive. It used
the drivers that were in the "Drivers" folder and not the ones inthe MPC
folder, even though I changed the "OemPnPDriversPath" to reflect the MPC
subdir.

I've also tried creating a "MPC" folder under the "$1" folder - no luck. Any
ideas? I really wanted to use the single image and have seen references
online that say its possible. we're not overly interested in using RiPrep for
now so any ideas would be appreciated.

Thanks...