Problem with Audio Drivers

[BlackHats]

hi there,
i have just installed Mac OS X 10.5.7 IAtkos v.7 version.
Everything goes fine with devices, drivers and others stuff.
My only problem is Audio Drivers. The system doesn't recognize my onboard Audio Device.
I have a ASRock Board - 775i65g Version, with Intel AC' 97 audio type.
(8086:24d5 - Intel - 82801EB/ER/ICH5/ICH5R - AC '97 Audio)

I tried different customize on installation for those drivers but with no success.

What should i do ? Where can i find this Audio Driver for Mac OS X 10.5.7 (IATkos) ? Any advice will be useful for me. Thanks for any reply. Bye