I’ve been playing around with my Clie a bit, and got a little frustrated because many of my MP3s and none of my videos had any audio on playback. A little bit of searching later, and I’ve discovered that the NZ (and prior) models had not-so-standard audio components, but audio is standardized in Palm OS 5.2. A little more digging turned up a great little gem called MCA2, or “Modern Clie Audio.” This gives the Palm OS 5.0 models most of the functionality of the later Palm OS 5.2 models. A note on the website says that it is only for the NX, NZ, and TG models, so if you have something even older, you’re out of luck unless your searching turns up something mine did not. If you have a solution that works better, leave a comment and let me know.