1. Batch render your scene(s) as images and combine the sequences together in some software. Either Freeware or pro like After Effects if you have it. Add the music after the video has been edited together in the same software.

2. Just render each scene/file and combine later, as mentioned above.

3. Not to sure about DVD format but .avi should be fine for the net. [SIZE=1](Watch the file size though)[/SIZE=1]


The AVI render in Maya is rubbish, just use .tga and combine.