I figured this out for people who use iTunes on Mac computers:
1) Download playlist
2) Double-click on playlist, then drag the desired song from that playlist out of iTunes and onto your desktop.
3) Open the song w/ Safari
4) On the right-hand side of the streaming song, when the song has completely loaded, click on the arrow on the far right and click on "save source as". Save the song in "music"
5) click on Macintosh HD, then go to music. Open the desired song w/ iTunes (since the default is Quicktime).
That's about it.