For Windows XP try this:

When it asks to hit F6 for SCSI/RAID driver hit "F5" instead. Pick "Standard PC". Your computer may not be compliant with ACPI. I do not know if there is an option for this in the Windows Vista install, but it will (and has worked) in Windows XP clean install.

In response to your question, you must do a clean install of Windows Vista Beta (upgrade will not work).