That might help. The mp3 editor I have (mp3trim?) is only good for cleaning up the start and end of the file. What's out there for a free full editor?
Try this one HERE:, it serves me well and does more than just chopping the files.
You'll also need to download this Lame DLL HERE: in order to export out to MP3 again after you modify your file. It'll ask for it the first time you'll export out to MP3.
If you want the ZIP file only, you can get it here:
.link for Lame:
http://www.webhostxpress.net/~mitiok/lame-3.95.1.zip
Copy and paste the lame_enc.dll from the .zip file into your QCD Plugins folder, and it is 3.95!