If i have 2 macbooks and want to copy one itunes library and iphoto library to the other macbook do i just use migration assistant (or whatever its called).. I want to just COPY not transfer and erase off the old one.. So i want to be bale to transfer it but still be able to play music on the old computer.. so i guess what im getting at is when using migration assistant does it transfer the files, or just copy and transfer? thank you!!