I use a program called " Audacity "
Its a free open source program and very powerful for what it is you can load an mp3 into it select what you want to delete and leave only what you like, It also lets you set all the bit rates and hz levels, Very cool I like it alot.
It lets you save things as wave files stock but their is a free D/L you need to get to export a file as an mp3.
Audacity: Free Audio Editor and Recorder
The version they have up 1.2.6 is a little newer then the one I have I'm about to D/L it and see if it comes with the mp3 stuff already, Anyway if not I can explaine that in a sec just post if you need help I'll try to help.
1.3.3 is beta I wouldn't get that one cause it probably would crash a lot
