I am trying to reformat my drive but I am currently at school and do not have any back up CD with me as far as I know. I am just wondering if it possible to start to reformat on Tiger, which would then require a reinstall or install of an OS I presume to which I would install Leopard since I figure I should upgrade anyway. Since I do want to upgrade anyway AND reformat, would I be able to kill two birds with one stone? Instead of Installing Leopard than reformatting my drive with Leopard and reinstalling Leopard? Any help would be appreciated.