QT is not a great app for playing mp3's. It lacks the ability to play all types of mp3's anyway. Get yourself a dedicated mp3 player. Why not get iTunes?! Whilst in osx iTunes will automatically import the files (once it's set to do that in prefs), however in os 9, you'd need to manually Add the mp3s to iTunes library (CMD+O). You can set iTunes as your default player for music by going to your LW Tools, Options & iTunes/Player (I hope that's right.) hehehe I've never used LW in OS 9 only os8.5/x. By the way, iTunes is all about play lists!