With the flurry of new & great music here I think it's time to re-open an old discussion.
What if we made a page in the add-ons for music. People can then choose which music they have. Theoretically, you can download STK without music and download those later from add-ons. And if you are upgrading, you don't have to re-download the music as well.
There's just one problem: Downloading music is one, but having it run in STK is another. It requires people to hack XML files, which is undesirable. Hence I have a suggestion:
Isn't it better to have the music define which tracks it's appropriate for, not the (i.e. track names in the .music file i.s.o. music names in the .track file). And yes that means that STK has to scan all the .music files before startup, but I still think this is worth it.