For those of you that are still having trouble getting the sound to work I was able to get it to work by doing the following as provided by djnitehawk on this thread (check out his awesome automation script while you're at it):

1. get rid of all other sound kexts that u have added, from both /E/E and /S/L/E

2. download the latest voodoohda and extract it...

3. copy voodoohda.kext to /S/L/E and run the following commands in terminal to fix repair permissions and rebuid mkext caches...

• sudo chown -R root:wheel /system/library/extensions
• sudo chmod -R 755 /system/library/extensions
• sudo diskutil repairpermissions /volumes/NAMEOFSNOWVOLUME
• sudo touch /system/library/extensions

4. install the voodoohda pref pane by double-clicking on it...

5. reboot and pray to the hackintosh gods :-)

I have a G31M-ES2L Rev.2. I was never able to get the legacy883.kext to work, nor the other two separate sound .kexts. Since I have the Rev. 2 the ethernet port never worked either so I decided to purchase the apple usb ethernet adaptor. It says it's supposed to be for the macbook air only but it works fine. For some reason it didn't work right off the bat. I had to go into the network control panel to 'activate' it. I'm dual booting w\ windows 7 so luckily there is a windows driver for this device here, although I have yet to test it.