I know exactly what your problem is, but explaining how to fix it is another matter
I think Sphinx has done a pretty good job
This thread and the posts by LOTR in particular might help also:
http://www.gnutellaforums.com/showth...t=m3u+and+file
Basically there is a file called an m3u (not mp3) which is a music list element rather than a music file and this is the small size file.
Pleas let us know if this helps