Well, at least the install is going now, I ended up loading the fail-safe BOIS settings, disabled all onboard HW except the IDE/SATA and USB. Right now UDMA and PIO are both disabled and the RAM settings are 2T so she's a little slow.
I'm going to have to figure out which "optimised" setting was causing it to barf, but chances are that once I get Windows loaded up with all the correct drivers it wont be an issue only the floppy-based ones in the pre-installation (DOS) OS...one can hope.