Do you remind which of those three avaible PS2 driver packages you installed?
http://i32.tinypic.com/dxzn1y.jpg

For the Audio: First you should create a back-up of your current AppleHDA.kext - so go to /System/Library/Extensions and copy it to some place where it is safe.
Next get the AppleHDA.kext from the ZIP file I have attached and HDAEnabler.kext.
You can install them easily using KextHelper b7 - just drop them into the programm window, enter your password and do Easy Install.
(Be sure that no VoodooHDA, AppleAzaliaAudio kext or similiar is present on your system the same time. - If it doesn't work either keep in mind to remove HDAEnabler.kext and reinstall old AppleHDA before you try a different solution.)

---