I have a 2008 MBP 2.2 running SL. 320 GB HDD. 4 GB Ram I don't have Multi-touch trackpad in my model and I don't have the magic trackpad. Do I need that for Lion? When I upgrade to Lion, will my current apps and settings be preserved? I have VM Ware with Windows 7. Will that be preserved? How does it run on older Macs? Thanks!