Exactly. That's actually why I'm asking. Prior to the firmware update, 4x media would actually damage the Apple Superdrive. (something about it not understanding when to turn the laser off) So, I've got the firmware update which is a workaround for using 4x media. The workaround being that it only burns 4x media at 1x. So, that's why I'm looking for specifically 2x, because my mac will burn only burn 4x media at 1x, and I was hoping not to downgrade my speed.
-Greg Neumayer.
Antifreeze Motion Graphics
http://www.antifreezedesign.com