So, my computers running leopard right now, and I want to reinstall it. The problem being, I have a drop in copy of leopard, which I am now realizing is not just a full copy of leopard but rather an upgrade disk, meaning you need to have tiger running, and you can't reformat your drive and then install leopard from the disk, at that's how it appears. I would just grab the tiger dvd that came with the computer, but my mom moved all of my stuff and I don't know where it is. So, does anyone have any good ideas on how I can reformat to leopard, or is it not possible without the tiger disks. If it isn't possible, does apple offer to send a new set of disks if the original are lost? Thanks for any help.