Andrew Locke said:
I half suspect the Vista installer is set up specifically NOT to completely overwrite your disk so that users/testers can easily revert to previous builds during the testing period. It wouldn't surprise me if that changed before release.
I really hope it does, but it doesn't look like it will.
By using Boot Camp to kick off the install (the Vista disc is recognized by Boot Camp), Vista doesn't complain about being unable to boot off the target disk, but still simply refuses to install on it. Drove me nuts.
Actually had to whip out XP x64, install it instead of XP 32, and then installed Vista x64. x64 has one unusual issue that after the install, the X1900XT glitches and doesn't enter into Aero Glass. The solution to that problem was simply uninstall the device driver, and then tell Vista to look for hardware changes... and then it will start working again.
I found that a lot of the extra steps you took wasn't needed in my case. No needing to remove drives, just keeping the USB peripherals down to a minimum worked. Those warnings you see about the PCIe ports is seen in Windows as well... it seems to be related to the fact that the chipset allows a couple different modes for the PCIe slots.
I am currently planning to disect the msi that is used by the Apple drivers CD, and rebuild a new one that is designed to configure audio for Vista so that the outputs work correctly.
EDIT: Vista x64 isn't exactly stable with the Radeon x1900 XT... kinda depressing, actually... Vista x86 doesn't have the problem. You have to uninstall the device driver every time you run Vista to get Glass.