That annoying message "DRIVER_IRQL_NOT_LESS_OR_EQUAL Blue Screen Error Message during Windows Vista Installation" which has been around since before XP.. states that some driver your using is BAD-corrupt-not compatible with Vista....
Next thing is made sure all drivers for all devices are downloaded into a spot on C:\Drivers then you can point to them... and load prior to installing Vista.
Seems that your also downloading BETA drivers.... that might not be the best way to go..
look under HCL and get the recommended drivers - (WDDM) version or other wise a signed driver.
from what I can see you are causing the problem ...
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I visited support site and downloaded the latest graphic drivers for my card and installed them.
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