About This File
Here are the 2 USB kext files from DP3 needed to get USB 3.0 PXHCD kext working in ML. Also included is the AppleUSBAudio.kext from DP3 as well. This fixes the issue of USB audio devices not working if you only install the other two kexts in final ML.
Thanks to the original poster for figuring this out. I just hunted down and added the audio kext to improve the workaround.