Hi guys. I have a question about upgrading the harddisk on my unibody macbook (last year's model). I have done a time machine backup and the macbook is running snow leopard. However, I currently don't have the snow leopard DVD with me, only the leopard DVD that came with the macbook. Can I still do the hard disk upgrade? In other words, can I boot with the leopard DVD, and restore back to snow leopard via time machine or do I need the snow leopard dvd?