Can someone tell me how to perform a clean install of Leopard on my mbp. I am new to Macs and want to reload Leopard. Is there a step by step out there? Also I want it to erase/format/delete all files from current install. I am not in need of anything on there. Also will I loose anything doing this? All I have is the mbp and a leopard disc I got when I bought the system. There shouldn't be anything else I need is there?