the hardest part with patching the dsdt with the autopatcher is the 30 seconds it takes to register on the site to download the software.... it may even be available elsewhere.
After that, just point the utility to the .txt file included in this thread and the utility will patch your dsdt. After I patched mine I tested it on SL, Lion and ML and everything seems to be working great
personally, I prefer this method over relying on extensions, etc. This patch also correct the dvd player issue for me...