so I'm buying Leopard on Friday and am going to install it. However I was advised against doing so by my IT department at school because our exam software may not be compatible. My question is what are my options( besides not installing) I know I can just reinstall tiger before exam time. But if I have a bootable backup on an external can I some how just restore that onto my laptop before exams so I'm back to tiger? If so how so I do that. Any advice would be great. Thanks