Hi- I just upgraded to a 2Ghz G5 and before I set it up I am wondering if I should partition the 160GB HD? I mostly use the computer for retouching photos in photoshop and some video editing in imovie. I noticed at work that we often have a separate partition for applications, one for data, and one for a scratch disk. Is this a good idea and if so how much space should be dedicated to each. Also how do I designate a partition specifically for a scratch disk? Thanks for any help you can provide.