Hello, I'm thinking about upgrading my MDD G4's processor to a dual 1.0GHz module. It's currently running a dual 867MHz, but the machine originally came with a single 1.0GHz. Will the stock heatsink (the one made from loads of stainless steel plates) provide adequate cooling? I do not really want to replace the heatsink, as they are for some reason really expensive. I can however, add some 60mm fans behind it. I am aware that my current motherboard has a 133MHz FSB and the processor I have in mind needs a 167MHz FSB to run at full speed, but my soldering skills are good and I'm happy modifying the board to run at full FSB speed. Thanks.