My new macbook 2ghz 1gb is supposed to arrive tomorrow. I didn't have the cash/real need to go with mpb. I am getting the 10$ upgrade in a couple days. Is there any downside to installing this myself since I jumped the gun on buying a macbook? Will I still get all the features that a leopard preloaded mb will? Also, is this macbook adequate for running leopard provided that i have no real heavy needs just notes, pdfs, movies and music? Any cool apps to download for newish mac user?