I have a 1st generation Mac Pro with 2 x 2.66 Dual Core Processors and was wondering how hard it is to upgrade the processors. I use it for HD video editing (Final Cut Studio), After Effects, Photoshop, etc. I've done some research and, from what I've read, it's supposed to be possible with 2 Clovertown x5365s (3.0Ghz). My question though is how hard is it to replace or am I better off buying a new Mac Pro?