Hi folks. Recently agreed to sell my early 2008 MBP and I want to do a completely clean install of OSX before handing it off, including securely erasing all of the contents of my current HDD. I don't know what sorts of personal information might be buried away in my computer (emails, Safari and Firefox passwords, etc..) I don't think that this person would attempt to recover that information or anything, but you never know and I guess I am also thinking about anyone else down the line that gets their hand on the computer that I don't know personally. Maybe I'm being a bit paranoid but better safe than sorry. What's the most headache-free way to go about doing this?