Intel(R) 82801GR SATA RAID Controller - Help with Install

I have been trying this for hours and hours and what seems like hours and seem to get further each time until now.

I had an unattended windows installation that on it's own works. However i just got a new Dell Preceision 380 that uses the Intel® 82801GR SATA RAID Controller and it's not detected by the windows setup.

Here is what i've got so far:

I added these entries to my winnt.sif.

[MassStorageDrivers]

"Intel® 82801GR SATA AHCI Controller" = OEM

[OEMBootFiles]

iaAhci.inf

iaStor.sys

iaAhci.cat

Txtsetup.oem

Then i copied the OEM Boot Files to \i386\$OEM$\Textmode as the document below says to.

http://support.intel.com/support/chipsets/...b/CS-020825.htm

Then i burn the cd and I get the following error during the windows setup:

File txtsetup.oem caused an unexpected error (18) at line 1747 in d:\xpsprtm\base\boot\setup\oemdisk.c.

Press any key to continue.

I can press a key to continue and it continues to load other files and then comes up with the following message:

Setup did not find any hard disk drives installed in your computer ....

Can someone please help me out, i need to get this computer sent off to the client asap but i want an unattended disk to go with it.