Well, no and no.
No, you can't change the contents of an .ini file dynamically.
And it's not the first song the one that's played, is the one called "menu_starmap.ogg", it doesn't matter where in the list that song is, it'll be played.
I guess that a small workarround would be to change that file so that's a mute sound, and that way there won't be any music at all.