So I made my own .wav file to use as a team anthem. Moved the file to the Fanfare folder where all the others were. The audio used is an 8-second portion of the famous Funeral March by Chopin but when I preview-play it in the team creation thing, it plays the default USA theme...if I remove the USA wav, the Funeral March wav doesn't play at all. I renamed Funeral March to USA, replacing the default wav (I backed up the original) and then it still wouldn't play...

So it only plays if the USA wav is in the folder, but then it just plays that instead...I remember hearing that customized anthems could be used, but apparently not...or i'm just getting something wrong...