Hey, I don't mind answering questions...if it helps someone learn something new. :)

This could be a very handy feature for you. These tabs let you handle various video and audio settings as well. For example, I've tweaked the MPEG settings here to get a large MPG file to fit onto a DVD (You get a bigger difference lowering the average bit-rate, rather than the max bit-rate.) You can also include audio with your MPEG file here. I still render the audio separately, but including the audio makes it easier to spot check syncing issues in the video before rendering to DVD. You can also review your audio and video simultaneously.