OK, so I have three Yonah machines... Core Duo MBP (2.16 GHz), Core Duo mini (1.66 GHz), and Core Solo mini (1.5 GHz). This question pertains more to the two minis, since I imagine they are easier to open up and tinker with: Are Yonah machines easily upgradeable to Merom? In other words, can you get a Merom chip and just put it into the same socket as an existing Yonah chip? Or can you only swap Yonah for Yonah and Merom for Merom?