I use to use Nero 7 in XP, and that doesn't work in Windows 7, so I'm pretty sure 6.6 won't work either.
I switched over to Burnaware
(Free version). For what I do I find it much better then Nero and is much lighter on the system.
Plus it is for Windows 7 32 or 64 bit systems!
They release updates periodically. New version came out today.