Hey. My friend can lend me his Leopard disk, but I'm a bit unsure if Leopard can run fast enough. It currently runs Tiger, and is useable, I don't know if the same can be said for Leopard. Has anyone ran it on an iBook, around the same amount of ram? Oh, and trust me, I have looked into ram upgrades, but due to the built in 256 and the previous owners extra 512, I cannot, as there are no more ports, without losing a good 512.