Hello, I bought Snow Leopard, but I have received a single user install disc instead of the family version. Before I go to the hassle of the returns process and have to wait for the proper disc to arrive, I was wondering if it is possible to install the OS on two machines with different owners? The sole purpose of ordering Snow Leopard was to immediately upgrade to Lion so if this disc can install on two machines I would happily carry and not bother with returning it - a lot of hassle considering we'll both be buying Lion five minutes after installing Snow Leopard. I obviously can't test the idea as to open the sealed OS would void my right to return. Cheers.