I've got the middle spec Core Duo Macbook with 1GB of RAM and the superdrive. Now, I can burn cd's just fine. Through iTunes or toast. However, I can't burn a single dvd. I've tried Toast and i've tried Burn. It'll start, then near the end it complains that the drive stopped responding (Burn) . Toast says there's a hardware error. I've tried plenty of different media, and I'm loathe to send the macbook in for repair after my last horrendous experience with the nearest apple certified center which is 3 hours away. Any ideas??