Might cause performance glitches though. And replacing might not be a good solution because the game might look for a specific file, instead of just playing whatever's in the folder. And unless you have a song that you absolutely love, thats hours long, I promise you that you'll be sick of it by the time you finish playing

If you can get it to work that is.
What might be cool is having a folder where you just dump all the mp3s in and having the game play whatever's in the folder like Fallout Tactics..but sadly it aint gonna happen.
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Why?