Hi. So I have a new (well, about 1 month old) Blackbook that came with 2GB of RAM (1gb of RAM sticks x 2). I upgraded it to 4GB of RAM with 2GB x 2 of OWC RAM sticks, and decided to keep the "old" 2 sticks of 2GB RAM. What I would like to know is whether it is allowable to put these sticks into an older White MB (all I know about it for now is that 1) it came with OS X Tiger, 2) it has 60GB of HD space...)...hopefully this is enough information, but tomorrow morning I can get more information if it is needed as I will have access to the laptop by then. So is it doable? What are the risks of attempting the swap? Thanks for your time .