I'm preparing to clean the guts out of my Mac and am thinking about buying a new fan and heat sink. In the guide, MacBook Core 2 Duo Heat Sink Replacement, there are pictures showing 'Santa Rosa/Penryn' alternatives. If I understand correctly, 'Penryn' is the CPU on a 'Santa Rosa' platform - a group of processing chips, or 'chipset'. The thing is, my CPU is a 'Merom', like the 'Penryn', on a Santa Rosa platform. The question is, 'Why is the picture called the 'Santa Rosa/Penryn' alternative, rather than the 'Merom/Penryn' alternative, or just the 'Santa Rosa' alternative?' I want to know because I'm sourcing a fan and heat sink, which I understand are different for Santa Rosa and Penryn, but nowhere is there any mention of Merom. Can I be confident that if I buy a fan and heat sink which look exactly like the ones shown in the guide for the 'Santa Rosa/Penryn' alternative (rather than the earlier MacBooks) it will be the right one for my 'Merom Santa Rosa' machine?