Hi Greg,
If you can successfully stream saved MP3 files, then you are halfway there. By the way, I would not run it with the firewall disabled, you should open the correct port. I've posted elsewhere on this forum about it.
The "live" streaming part depends on the source selected. Use the Options button and Live tab and edit the source. Open the Open Volume Control button to select the source. In XP, this opens the Recording Properties of the sound mixer, and then you select a source from there. You might have options such as "line in" for the line in audio connection, "Mic" for the PC soundcard's mic connection, and "wave mix" or Stereo mix" which streams out any audio being generated by a different audio program, such as winamp or a radio automation program.