deploying to T5610

We have WDT on Server 2012, and have been deploying without issue to our old T5500's and T5600's

We just got a new batch of T5610's and tried to deploy our image

First UnAttend couldn't apply the disk configuration, but that was due to missing Pre-OS drivers. I imported them all (LSI, MegaRAID and Intel)

BlueScreen on an LSI driver. Removed that from the store and boot WIM and the system boots and installs Windows 7 x64 without issue

Then when running windows for the first time, Windows fails to boot due to a "corrupt or missing iaStorA.sys 0xC0000098"

The driver is definitely listed in the driver groups list, I even tried importing the latest driver from the normal Dell Drivers site (A03)

Any ideas on what I'm doing wrong?

Thanks!