If you buy a separate copy at time of purchase, it may not install, informing you during the process that "You cannot install iWork on this volume. A newer version of this software already exists on this volume." Only that on my new iBook, I deleted the demo, assuming that like Microsoft Office 2004, you must do so before installing or else it won't. Apple has changed the rules for this sort of thing and now I'm stuck with something I can't use -- though I haven't tried installing it on my 17" pb yet. Bummer.