Well yesterday I took a CD rom drive from a dead Rev. A iMac and put it in my Pismo. I don't know too much about the CD drive in the iBook but assuming its standard ATAPI size (and not some super thin kind) you can get almost any optical drive in there. However what you might want to do first is take the thing apart and look at the maker of the drive. YOu probably want to buy a drive from the same company so that you can put the same bezel on it. Otherwise it will end up looking ugly, like the iMac CD drive currently sticking out the side of my pismo. Mine looks pretty gross because it was not possible to put the black bezel on the CD drive since the screw holes didn't line up. I also did a bad job of filing the iMac's bezel down to fit the PIsmo. I need to take pictures of this, too bad I have no camera.