Hey all, I can't seem to find a definitive answer. My sister just gave me her 2008 unibody macbook. It's currently running 10.5 leopard on it, now the question is if I buy the lion thumb drive on eBay, will I be able to put it right on the macbook, or will I be forced to buy the snow leopard cd and install that first? I am upgrading the ram 4gb as well. Thanks in advance!