This is probably a stupid and obvious question, but I'm new to using a Mac as my main computer, and sometimes the simplicity of things can seem unnerving. My iMac is off for repair later in the week, it has all my personal details, banking, and business etc on it. Am I correct in thinking that I can use the OSX (10.5) install disk to erase and install a clean OS, take to get repaired, and then when I return plug in my USB hard disk I use with Time Machine to restore the iMac to my personal last used state? Does this put back everything, by that I mean all applications, files, preferences, the whole thing, so it's "My" iMac again, as if I never clean installed OSX? Sorry for the basic questions, but I really fear loosing data just to get my iMac fixed.