In Jaguar it was possible to use the external keyboard for booting into single use mode (s/cmd key), start up from a CD or DVD (C key), eject disks on startup (mouse down or media eject key) and change from OS 9 to OS X by holding down the X key. Since installing Panther I have tried all these techniques and none of them will work any more. You have to open the lid and use the Powerbook keyboard instead (and in the process, unfortunately the Powerbook screen rather than the external monitor). Bummer! jg