finaly, You are running on Leopard without problem and 5.1 surround is better for you

nice, I am happy for you.

for p35 chipset , you can get audio 5.1 without a problem. and the problem is ICH10 with ALC889a.

I also want to know which one helped you to get 5.1

and do you share us your experience about ideneb installation which options did you select and
did you work with 945 chipset?