I personally find some of the Drox music unbearable.
Even though there's some great background music, and some of the races have nice tunes when you talk to them, most of the time you'll be fighting the Overlord or Talon, and though I could take their tunes once in a (long) while, I cannot stand their music playing all the time. I personally also don't like the Drox main tune.
silences all those tunes while keeping the race tunes and the background ambient music. Just drop it into your Drox\Assets folder. If you want, you can also open up the zip file and just change the appropriate files with whatever music you prefer. Just be warned that it'll play most of the time, since most of the time you're fighting those space monster races.