I have Vegas 6.0 and I usually create simple videos with plain audio. But for the video I'm working on I want the final video to have 2 separate audio streams so the listener can select which one they want to hear in the player. Unfortunately, I haven't been able to figure out how to keep them separate.

I have 2 audio tracks but when I render the video, the audio tracks are merged into 1 audio stream. I've been looking all over for information on how to do this to no avail and I've seen videos that do this. Currently I'm rendering with XVID and Lame MP3.