I recently upgraded Tiger to Leopard and while for the most part it's been great, I have noticed some hiccups that appear to be fixed from a clean install of the OS. However, before I hit the proverbial big red button, I'd like to ensure that I have everything backed up - and not just a clone of my existing HDD's, I'd like to do a select backup. I'm not worried about my movies, documents, pictures, music, and other types of multimedia and data, as that is all stored on a separate HDD that will not be formatted. What I am worried about are things like: where Mail.app stores its emails and settings, Safari bookmarks and settings, Aperture settings and its database of pictures, Photoshop actions, things like that. While I'm pretty sure I can do a spotlight or some such search for most of this stuff, what concerns me is if Mac stores things in multiple locations/directories and subsequently, how to import the data once I've reinstalled everything. Is there a program that I can use which can selectively backup application content (e.g., Mail.app's emails) and specific settings (e.g., Photoshop actions), and then reimport them afterwards? I would just hate to think I've backed up my 2600+ emails, format, reinstall, then find out I didn't copy over the "index file" or something like that. Any advice on how to proceed would be much appreciated. Thanks!