My old thinkpad has an HD of Seagate Momentus 5400.3 (Ultra-ATA/100). Can I use it in macbook? Is it compatible with macbook? 5400.3's performance is greater than 5400.2, it is very close to 7200 rpm HD's performance. It seems that the default HD of entry Macbook white (MB061) is Seagate Momentus 5400.2 80gb SATA. Is this right? Thanks in advance.