You could try the Beta 2 driver and see if they work (if so, you can use it through November 4th, which is when it's set to expire), but if not then you'll have to wait until Creative releases an updated driver. Just keep checking back to their download site.
Is there any drivers for Vista RC1 for Audigy ZS 2 sound cards yet? I found one for beta 2, but can't find one for RC1. John, any ideas?