i got vista beta working after some s

I dont know if this will help all of you but i had the same problem with it freezing after a reboot (during setup) or if i tried to run it off the Dvd. Did the sum check like in that guide and it all checked out fine so i iknow it wasnt the iso file. After much thought i figure i go into the bios and start looking at the settings. I disabled USB legacy (it goes for my front usb panel) and disabled quick boot (it will check all of your ram on first turn on of system, it does it fairly quick) and also Num Lock On by default. When i rebooted it made it past the part were it would alwasy hang at. Again i hope this helps. I'll try and answer any questions regarding it as best as i can.