I was going through the Macbook Pro forum and inside a thread debating about Macbook and Macbook Pro stock there was somebody who replied with you can put 8gb of ram into the white unibody Macbooks? Is this true? Will it void the warranty? This will be my first Mac so if i can save $200 then i will get the Macbook. I really have no need for a backlit keyboard or firewire ports and the sd card reader. Thanks!