The battle tracks do activate. These areas all have PSE tracks that work too. One thing I've noticed, trying to play TuneC on the jukebox will cause it to freak out and repeat the phrase it's currently playing - there is no 'H' variant for these tracks.
You need to repack and rename the .mus file. I've done a few tests and it seems they only works with songs that are similar; eg, trying to put area music on the title screen will cause it to crash, though the emergency lobby theme will work (but later crash it because the title screen has two parts) - if the area you're switching to doesn't have the right sympathy states for the track, it'll probably crash.
I'll add them to the file directory later.
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