If you want a random change you can try my Loading Screens mod.
http://www.subsim.com/radioroom/down...o=file&id=2822
It has 100 randomized loading screens and 25 randomized Fanfares, so a different one plays every time you load the game. It requires SH3 Commander, but that's an essential tool anyway. 'Muss I Denn' is one of them, because it's my favorite too.
An alternative is to follow the SH3C Random structure and put in whatever songs you want. If you want to do that I'll be glad to help.