My situation went like this, first I got plane then noticed no custom sounds like GPWS, Windows, buttons, APU, etc. So came to the forum looking for answers and saw this thread, attempted the changing the 1's to 0's and still no custom sounds. So I gave up for a bit and then came back to try again and thought about codecs for different formats of media and found the shark codec package, with just about all formats of audio and video. After install sounds work fine now. All I have to do now is just every time CS updates the installer have to rechange the 1's to 0's again.

Also running Windows Vista 64bit, with the codecs I first installed the Vista 32bit installer for my OS as required then ran the 64bit installer and I was up and running. Some of my favorite FSX aircraft now.

Added: Also I did not have to edit anything within the program, I just installed and all was fine.