AsRock has released new 1.50 BIOS for ION 330.It has "Sata operation mode" option. I've change to "ACHI" mode and iDeneb v 1.5 setup booted up!
This is excellent! I've updated and tested, OSX will boot and see the sata drive. =) Thanks for you post!
Now the hard part... the customization screen. Have you got it working? I have an asrock nvidia ION 330 and I'm attempting 10.5.6.
I have xbmc live and windows 7 also running on this box too.
EDIT: I did have to use the CPUS=1 argument.