I wanted to add the Intel ICH9R RAID drivers and not having much luck.

Prior to running USB_MultiBoot2, I created Textmode directory under $OEM$

Copied iastor.inf, iastor.sys, iastor.cat, and txtsetup.oem to Textmode directory

Added the following to winnt.sif

[MassStorageDrivers]
"Intel® ICH8R/ICH9R SATA RAID Controller" = OEM

[OEMBootFiles]
iaStor.inf
iaStor.sys
iaStor.cat
Txtsetup.oem


I keep getting a BSOD after the storage drivers load in the text mode install.

I used USB_MultiBoot2 with a USB Stick.

I've successfully installed from a generated image before, but this is the first time trying to add the RAID drivers.

Am I going about this the right way?

Please look here, from post #8 and below:
http://www.msfn.org/board/Issues-Setup-t111989.html

You have the option to use txtsetup.sif, search on msfn.org, there are number of how-to's, or simply use BTS mass storage drivers pack.