Forget it :noway:

Hey Don - I can't forget what I never knew, but you must have your answer so that's good.

There is plenty of audio file editing software available that should be able to edit that file. You might need to convert it first to a WAV or some other uncompressed format and edit it. The problem here is that mp3 is a lossy format already, and converting it twice will make it even worse sounding after the editing.