I have windows XP and Windows media player 9, but I am unable to right click on a mp3 file (windows media 9 is the default application for the file type) and I don't see the choice "queue this file" or "queue it up". If I crtl+ select a group of files and right click and choose "Play" I get a message that playing that many files at once may affect performance and use a lot of memory or something to that effect.