I have just gotten a new machine. Questions: Often when I open a window (using FireFox), only half the screen is filled. How does one make the page occupy the entire screen? Also, can one use Morpheus or Limewire on an Imac? If so, should I use FireFox or Safari? How do I download the Apple Dictionary? Finally, I should have paid more attention to the sticky about backing-up. Just lost 20 gig disc. Hence the new machine.