I have a 1.83 Ghz MacBook with 1g of ram. I currently have a 60g hd and want to upgrade. I have read posts and it seems that everyone who upgrades their hd seems to just swap it out with a Western Digital Passport hd. I have a 320g Western Digital Mybook hd, and want to make sure the swap will still work if i take it apart. I talked to a computer savvy friend and he said the model shouldnt matter, but he also uses Windows : ) Can anyone help???