Hello everyone and happy holidays! Sorry for asking a question that has probably been beat up as of late, but I have not received a clear answer - I'm helping someone upgrade their hardware so that they could run MacOSX Lion, but they're rocking 1GB of DDR2 RAM on one of the older white Macbooks [2.4 Duo Model.] Does anyone have tips on what type of RAM that I should advise him to purchase? I'm thinking two 2GB sticks of DDR2 667Mhz PC2-5300, but well... 1) I am not sure about how reliable certain companies are when it comes to hardware. 2) I have heard mixed results about using 2GB ram sticks with this Macbook model. If anyone could please advise me, it would be greatly appreciated! Thanks everyone!