I just brought my first mac computer a few hours ago (blackbook) and I love it. One thing I'm would like to do is reinstall mac os x so I figured I'll partition the hd too. With windows xp, I had my "My Documents" on a separate drive for easy backup. In Vista and Linux, there were too many hidden and random folders so I just kept the documents themselves on a separate partition and kept the "Documents" and "/usr/[user name]/" folders on the main partition. I figure I'll lose settings but it'll keep my documents partition clean. I was planning on doing this as well with mac os x but would it be better if I just mount the entire "/Users/[user name]" folder from the separate partition? Would this screw up permissions if I reinstall mac os x later one because the settings from the previous installation will be there?