Please add proper titles to the tracks (some media players only show track name, not file name) and please loop some of the 1 minute 30 second battle songs once for the sake of listen-ability because they loop so beautifully in game. (or at least the tracks that benefit from this thematically speaking)
Also if it helps, I believe you can create a 'digital album' using a program like EAC (exact audio copy) to add all the metadata and also album art more easily. Though I don't know what other programs exist that can also do this.