Sorry for the noob question here, I am kind of new to all this. I recently purchased a OWC 500gb external HD. In the past few weeks I have already captured about 100gb worth of video and photos on it. My Macbook has been running a bit slugish recently and I have thought about doing a clean install once leopard comes out. Here is my question... How do I go about doing that? I understand that if you partition a HD you loose all existing info. Since I have already captured 100gb worth of mini dv tapes I would hate to loose all that or to do it all over again. Do i have to partitian the drive in order to make a full copy to install from?