there is a way to do it to the ones that are .at3?
Using UMDGen 4 I was able to take my music that I converted for GTALCS and use it in NFSC. I just had to rename the music to the music in the game along with the .aud extension.
I might try to find the files for the music info and hex edit it.
Thanks for UMDGen, GREAT program!!!!!