[chiefmark]

Hello,
I wonder if somebody could help me in locating a sound driver for this laptop. I'm working on it for somebody who purchased the laptop with a copy of Vista Home installed but decided they wanted to downgrade it to XP Pro. After doing this, the only driver i've yet to find is the audio driver. I've tried various drivers including sp20309, sp32646, sp32823, sp33867, sp34200, sp34204, sp36089 and sp36090. I've installed tried installing the Microsoft UAA Bus Driver for High Def Audio before installing these drivers but still no luck. In device manager, it just reports a question mark. Any help would be greatly appreciated.
Thanks,
Mark.