current music pointers

when it comes to current music where is the bank for the maps that allow the (current music) setting to be changed? for example, in south figaro, shadow's theme plays in the pub but then it changes to the imperial occupation theme to the town theme. i want to make the default current music play the imperial occupation theme in most of the towns as the current music and have "forever rachael" play in the old man's house where he is watching over rachael.  i know the editor can change the music, but as far i am aware it cannot change the default current music.