well, you already said you DOWNLOADED those....
for one, when u do grab the CD, the windows media player assigns them a unique ID that prohibits playing those files on any other computer except your own (at least, i believe it is so), so don't bother grabing the CDs with the media player.....
sure, u can use media player to grab and burn CDs, but only on the computer those WMA files were created.....
in other words, just download MP3 versions of the file (or any other audio format)
this isn't really helpful, but it can be a warning for future music "sharing"

))
also, how come Luci's method doesn't work ?!? weird