hi there, i have a Powerbook (the last revision Apple released) and i have Leopard 10.5.4 running on it right now... since i got a Macbook Pro though (waiting for delivery) i posted an ad to sell my powerbook on a site here in Greece. a dude called to say he's interested but was wondering if he can format it and install OS 9 since he's running ArchiCAD 7 on OS 9 now and thinks it won't run at all or at least not that well on Tiger or Leopard. hence the question, can it be done? or is there a hardware limitation somewhere or something? is it as simple as sticking the OS 9 disk in the powerbook and going through the install process as usual? this is a bit urgent so i'd appreciate a hasty reply, thank you! if you can point me to some documentation that'd be awesome, just to put his and my mind at ease! thanks again!