I have a 15 inch 1.25 GHZ Powerbook G4, Aluminum with a superdrive. I can no longer burn DVD's with it. I didn't know that macs didn't burn DVD+R disks and tried a couple times before finding that out. Now when I try to burn a DVD-R disk it gives me an error message. Anyone know if I can fix this or if I have to get a replacement drive? It burns CDs just fine. Reads DVD as well. And yes it's burned DVDs in the past. Please help!