I plan on purchasing an old strawberry iMac. I have a few stupid questions, I don't have much experience in taking apart computers and if I purchase this I want to be able to beef it up a little bit. Here are my questions: 1.) Is it possible to put a bigger hard drive into this computer? If so, what kind? 2.) Is there any possible way to run leopard on this? It sounds ridiculous but if there's something I can do to this computer to make it run leopard that would be amazing. 3.) Would a new external hard drive be compatible with this computer? Thanks.