Never mind I got help from another user:
The Ansewer is
<b>In Terminal</B>
ln -s
(with a space following the "s")
Drag the mp3 folder (original) onto the Terminal window
Drag your mp3 alias onto the Terminal window, and the add "copy" onto the name
If you look at your site you should be able to click on mp3copy and reach your mp3 folder You might need to click the refresh button of your browser (to remove the old page from the cache).