I got a mid 2007 Macbook 2,1 (MB061LL/A) that I want to add memory. I see DDR2 PC5300 on Amazon labeled for some Dell laptops (here). Will these work in my Macbook? Is PC vs PC2 important? Is there anything more in the spec I need to look for: DDR2 PC2-5300 667 Mhz 200 pin SO_DIMM? Thanks so much!