Not sure about this but I think there are some crossover between the SFX stems and the Music ones.
I know with the "listen to the planets in the system map" trick that the recommendation is to have the music "unmuted, but turned right down".
But I am a total wav file replacing guy.
I got my daughter to do a voice read when she was four and replaced all the files in my NavMan.
So the voice in our navigator was this tiny kid "In five hundred meters turn left". We had it for years, and she loved showing it off to her friends. Some cretin stole it from the car which was sad, but I do like the idea that someone bought it from a pawn shop or something and she's still out there somewhere - telling some junkie lowlife how to get to their methodone sign on. Or maybe in a family's crappy second car.
So I'll plus one for this trick, even though I think it will probably break stuff.
And also you have appalling taste in music.
You need to listen to more tasteful stuff like this Irish band that used to support U2:
https://vimeo.com/201372794
https://vimeo.com/201372794