Make an individual folder under roms folder for the game. Put the ISO and the MP3s in that folder, you don't change them to wave. Make sure the tracks are labeled like Example:Final Fight.iso, Final Fight02.mp3, Final Fight03.mp3 etc... The name of the iso and mp3 files has to match. Final Fight.iso and FinalFight2.mp3, Final_Fight-02.mp3 won't work if the iso is named that way. Are you using KEGA Fusion? That is the best one.