Hi, I'm trying to install Mac OS X tiger unto an Ibook G4 - the Cd boots and I get the gray with the apple.. but then it goes to a really low quality picture of a mighty mouse with the numbers "1" (put in batteries) and "2" (turn on) underneath. It's been at this screen for about 15 minutes and the cursor will not move with the track-pad. (I know the track pad is functional however.) Do you actually need a mighty mouse to install Mac OS X tiger? Or is this strange behavior? Thanks.