MacBidouille are reporting (in French, needless to say) that the SuperDrive in some MacPros is not the Sony unit it appears to be, but is actually a better-specified NEC 4750 clone, which can write DVD-RAMs at 5x, and write CDs at 48x. They have succeeded in redefining it so that you can use its latent capabilities. http://www.macbidouille.com/articles/216/page1/ It's three pages long. I could translate it, but I can't be arsed. PM me if you really must know what it says.