I have at home an iMac (daughter), MacPro (me), and a MacBook Air. When Snow Leopard was released I ordered to family pack and upgraded all the computers. Yeah - keeping it legal. Question is - if I sell or otherwise give away one of the Macs I would like to be able to give the new owner a copy of the OS. However, the family pack is provided with one original disk. How do i ensure that the owner gets a legit copy of Snow Leopard? Can I only provide the Mac with the Lepoard disk that it came with?