Yamaha YMF744B Sound

I'm using a Sony Slimbook with the model # PCG-N505VE. I can't find (don't know if it ever came with) a restore/driver disk from the namufacturer. I've downloaded what Sony says is the correct drivers, but the install won't let me finish because it says i'm not using a PCG-N505VE laptop, which I am!!!! I've searched all over the internet and can't find drivers for the sound card.. the specs say its a Yamaha YMF744B.. If anyone has any ideas or possibly the drivers themselves that would be a HUGE help! thanks

You might try <a href="http://www.windrivers.com/company/yamaha/index.htm" target="_blank">these Yamaha drivers...</a>