QNX and SCSI boot (from ncr-53c810)

Hi
I have an built-in scsi controller, and I am unable to boot off a scsi
drive that contains the windows based extraction. (No seperate partition,
simply seen as the d: drive under windows)

Is it possible to boot off a scsi drive? Its a ncr-53c810 which is on the
supported list
http://qdn.qnx.com/support/hardware/platform/filesystem.html

Thanks

Chris