You can try copy the driver files to the i386 folder and then update
txtsetup.sif
Example with the VIA Serial ATA RAID Controller
[SourceDisksFiles]
viasraid.sys = 1,,,,,,_x,4,1
[HardwareIdsDatabase]
PCI\VEN_1106&DEV_3149 = "viasraid"
[SCSI.Load]
viasraid = viasraid.sys,4
[SCSI]
viasraid = "VIA Serial ATA RAID Controller"
Make sure the PNPID matches your hardware, use devcon or device
manager (in detailed mode) to find out...Otherwise you have to change
the txtsetup.sif
Just add antoher line in the [HardwareIdsDatabase] section (also make
sure that the txtsetup.sif doesnt contain other drivers referencing
that pnpid)
FILE: DevCon Command Line Utility Alternative to Device Manager
http://support.microsoft.com/?kbid=311272
How to Configure Device Manager to Display Detailed Information
http://support.microsoft.com/?kbid=304514
regards
Johan Arwidmark
Windows User Group - Nordic
http://www.wug-nordic.net