Ok about 1 week ago i purchased my new quad core imac i transferred all my files including my itunes library (music, podcasts, videos and apps all of it). Now i need to make my new imac my default itunes library for my iphone, but to do this itunes is saying i must delete ally stuff off my iphone and put it back on again. I am fine doing this but i have a few concerns. -What exactly will itunes delete off my iPhone? My pictures, contacts anything like that? -Will all my app preferences and game scores be deleted when itunes resyncs them?