Someone suggested using Quicktime Player to do this (in the "Any way to make multiple tracks off one long MP3 file?" thread), and I must say it works well. Only problem is that it saves the file's type as MooV. When I change the type to MPEG and play it back, I get this weird clicking noise at the very beginning (I cut out some material from the beginning of the track, so that may have something to do with it).
Is there any way for Quicktime to save files in their original formats? I could save it as a movie file and then convert to mp3, but I don't know if that would lose some quality along the way.