DVD Maestro adding multiple videos in each "movie" track

I have noticed that DVD Maestro can allow you to add multiple video files into each "movie" track. I would like to do this, but I am having problems adding the audio when I do this. After I get the first video and audio, I can add the second video, but when I try to add the second audio it wants to replace the first.

Just in case my wording is confusing:

"MovieX" is what Maestro calls each movie which later turns into a VTS when compiling. I would rather not have a DVD with 35 VTS titles and would like to cut it down a lot.

I would like to if possible to do it in 4 or 5 movie tracks so I will have only 5 VTS on the DVD.