This is one free program you can use:
http://www.freecorder.com/
Download and install it. Then play your audio through your regular computer player. At the appropriate location, press record on Freecorder and stop at the next appropriate location.
It will save as an mp3 file.
Thanks to all of you. I am making the freeloader downloader now. If that doesn't work I will go to the next download.
I knew you would all have an answer!
I am now massively screwed. I tried to play my mp3 on freerecorder, and now it's a broken link and off of my computer. WHAT DO I DO?