I just recently bought a Early 2009 8-Core 2.26 Mac Pro. I've been reading for days now about swapping the two Quad 2.26 processors (X5550) for two Quad 2.93 processors (X5570). I'm not looking to get into the whole Hex Core processors and updating firmware thing from 4,1 to 5,1. But is what I'm trying to do really that hard to do? I read all about the "integrated heat spreaders" and the possibility of damaging the sockets from tightening the hex screws to tight. But when I bought this MP off ebay, it says clearly in product information for all these Early 20009 Mac Pros its: "Compatible with a 3.33 GHz processor or with two 2.93 GHz Intel Xeon processors" If anyone could just give me some feedback or a minor step by step process on how to go about this and the best way to do it, I'd truly appreciate it. Even if you have a better solution or idea, that'd be great.