Some of the time, you will need to convert the audio file from a .wav file to a .mp3 file. For our purposes, we will use Audacity, a free audio editing software package. There are other programs with more features, but this will be fine for most of our purposes.
While you are in Audacity, you should clean up the audio. Remove some errors, but you don't have to make it too perfect. Don't bother with adding sound effects. Make sure that the message of your script comes through.
When you are done, you will need to Export as Mp3. You may also have to associate audacity with Lame.dll On the ocmputers at school, it should be in the C drive in a folder called Lame.
Save the mp3 in your audio folder on the hard drive.
http://www.edhsonline.org/other/audacity/
The page below has a different version of this information with a little more detail -
http://mendocinomotor.pbwiki.com/PodcastProcess
If you find a better way of doing this process, pass the word.