I bought a MacBook pro recently and so did my cousin. Mine came with 10.6 because it is an apple refurb. His cam with 10.4 because it is used. He doesnt want to spen $250.00 on the Snow Leopard install discs. I was wondering if he has to just spend it or can he use my 10.6 install disc that comes in the MacBook pro boxes when you buy them. You know those grey ones that say Snow leopard install and applications install with the white on top. Are they just for restores or can they be put into his MacBook pro to give him 10.6. Is it illegal to give it out if I can put it in his? We are both starting developing iPhone apps so he needs 10.6 for the iPhone SDK and Xcode. Thanks, Jamie.