I have the dual 1.0 MDD and added a 52x32x52 Lite-on cdrw to my lower bay and it was very easy. xlr8yourmac provided me with a few tips like how to slide the face of the tray off so it doesn't hit the rounded edges of the drive door and better drivers, but apple has added its own drivers since panther I think so the old hacked drivers aren't necessary anymore. PM me with questions, its a great machine with lots of expandibility.