In one of the guides I read on how to use dvd shrink, it said you may choose to discard some of the streams to save space. Why would I choose to discard the dts audio stream vs. the ac3 audio? What's the difference? Thanks. By the way, the advice on this forum has made it very easy to backup my dvd collection using just shrink 3.2 and dvd decrypter 3.5.1.