Hi, i had the same problem. I lost almost half a day to solve it.
The problem was in ram. I have 8gb of ram. I put hardware one by one out of computer (graphic card, firewire card, ....) and restart win instalation dvd and detected that one ram slot is corrupted. Than i put this corrupted ram out and installation went very well.
While i was loosing my mind because of the error and waiting the resultst of instalation each time i put one piece of hardware out i was surfing via apple sites and making my calculation to go on mac pro.
I think that microsoft should have a list of products per hardware which is running smoth on win operating system and should test it so that they can guarantee that if people buy this and this that win will work well.
Check your ram!