I have a three year old iMac running leopard and want to get a newer machine. The new machine will come with snow leopard. I need to stay with leopard, at least for a while because one of my programs, quickbooks (Grrrrr) isn't compatible with snow leopard. Can I clone my current leopard hard drive to the new snow leopard iMac? In other words will the new iMac run ok on leopard? Thanks!