I don't know if this has been covered before in detail and I apologise if it has, but I'm looking for some definitive advice on how to backup the following so that I can re-instate it in Tiger: 1. Address Book 2. iCal Calendars 3. Mail The way I see it, I want to wipe my disk clean and do a fresh install, but I want to be able to just copy across or import the above so that I retain my contacts, calendars and mail. Is this possible? Will the apps in Tiger be fundamentally different which will make this impossible? Many Thanks for your replies.