Three months ago I bought a brand spankin new PB G4 12", and had to deplete my life savings to buy it. I just got a job, and in a year will have the $3500 I need to buy that 15" or 17" PB I have always wanted. Since my little PB, a great machine, but nonetheless, it wont see as much use as it did, I had an idea for it. I wondered if I could modify it, as I do so often with my computer stuff. If i say, added a bunch of ventilation, would the fan that was inside in combo with all the new holes help the PB to run cooler? Would it stay cooler longer? Or is it just a waste of effort? Are there any efforts already in progress to help cool the PB's?