I would like to create a DVD with multiple Audio streams. I could create two videos with different audio (and same video content) but that seems like a waste of storage on a DVD to me. I have seen commercial DVDs where you can select different audio streams for the same video content.
Any ideas how should I start on this?
The norm is to export video and audio out of Premiere Pro separately. Doing this, you will end up with one video file and multiple audio files. Bring them into Encore and add them to a timeline.