Thought I would update my findings.
Summary: What I wanted: To name audio tracks whatever i wanted. Why? I created a collage movie of home movies and want users to select from different types of music to watch this.
Conclusion: You can't name audio tracks, as they only correspond to languages, although the question of an out-of-mux menu is still possible but it is outside the scope of my research. Essentially this menu would map names to audio language tracks, but a two year old puts that out of reach.
What I did do? Quite a bit actually.
1) Using Easy Creator 2009 I created my movie and DVD and saved(burned it) to a folder. The DVD was 1 menu with four links, all pointing to the same movie (thus one title).
2) I used pgcdemux to separate audio and video streams
3) I used muxman to multiplex the video from above with 4 audio tracks the same length as the movie. You can have up to 8. I used Roxio's sound editor as it came with EasyCreator and create .ac3 sound files.
4) I used Vobblanker to substitute the Roxio title with the one from Muxman.
5) I used IFOedit to change permissions, eliminating all prohibited user actions on the title (so I can switch using controller). This could be done with pgcedit as well, but I discovered that later.
6) Since the link from the menu doesn't correspond to the correct audio track I used pgcedit (great program) to add a few basic DVD instructions at the beginning of the movie title. DVD's have instructions which connect the pieces and do different functions, as well as registers, both general and special. General registers can be used by the person writing the DVD and some of the special registers can be changed via general registers or functions. The registers can be manipulated either prior or after playing a title. pgcedit allows you to do a trace on the dvd commands, and which registers are used, and where they are changed.
When I clicked on a link on the DVD (link 3 for example), this was saved in a general register. In the calls prior to the title, I just moved this to another register that was not used, subtracted 1 (audio tracks are 0 based), then used SetSTN audio=general register. This changes the current audio track being played.
You can also used the audio functionality on the controller to change tracks during play, although the name can not be specific (succh as Gershwin or Meatloaf).
Questions posed in thread: Why not have a movie for each and have in DVD?
Well, one hour of high quality movies * 4 audio tracks would have meant 4 DVD's. The additional audio tracks do not add a lot of space (depends on length and quality).
Also, this would not have allowed users to switch during thre movie, as each movie would be a separate title.
Open: If you figure out how to do an out-of-mux menu please let me know.
I hope you found this interesting. The first go took some time but know I am able to cruise through the above with a DVD in no time at all.)