THIS IS EPIC MAN!!!
You just need to delete the audio since finished and then put the video archive on a program like Sony Vegas or Movie Maker.
Then just put the audio in the corresponding parts and render the video.
That should save the audio.
4 for the voice acting and animation, but you've got a great joke which is the true essence of NG!
LOL, is true, the jokes on movies and series actually is all about buy something -Original movie sucks :P-