Hey, guys, I have the 13" Mid 2009 MacBook (MacBook5,2) and I'm looking at upgrading it to Yosemite, but I have a few questions before I do so: 1. Since it's running Leopard 10.5.8, what's the easiest way to update to Snow Leopard 10.6.8? 2. Could I just run a clean install of Yosemite via a USB boot? 3. Once updated, can I update to Yosemite via the App Store, or does it need to be a standalone download? 4. Will the original RAM modules from my Late 2001 MacBook Pro work in the 2009 MacBook? Thanks in advance!