You no longer have to get permission to test this feature, it's available in the latest beta @
http://neosmart.net/forums/showthread.php?t=642
Preferred method of testing:
Add/Remove Entries -> Add a new (second) Vista entry (to the same drive)
Advanced Options -> Select the
new entry and enable x64 driver bypass for it.
This is just in case something goes wrong.
Please post back if it worked/didn't for you.