I have the late 07 Macbook Pro 3,1 It has a 2.2mhz processor with 2GB C2D ram. Does anyone know the maximum amount of RAM upgrade I should install without going over the practical usage level? I've read places that anything over 4GB is worthless for this model and I would like verification. Actually, same question goes with my internal hard drive....I have 120GB and would like to expand to at least 500GB or more if possible. Any help or advice would be appreciated!