I recently installed a new 60 GB HD into my little niece's Late model Macbook. It crashed and was making weird noises and i came to the conclusion that it needed changed. I think hers was 1.86ghz, not sure if it was intel but it was core duo and 512 ram? We dont have any of the instal disks. Im not sure if it was The intel mac or not. One doesnt support booting from USB i believe. Anyways, her's doesn't. I also have an earlier macbook 10.6.8, 2.0ghz intel core 2 duo, 1gb ddr2sdram, 80gb which i backed up via time machine. I tryed booting hers up by my external which is a usb HD and nothing. Just a blinking folder. I have read about the firewire but really dont understand it??? Should i copy my HD to a firewire external and then boot hers to it? Its almost christmas and she really needs her mac up and running so she can talk to her other family members that live far from her. Thanks in advance!