so i just switched over from a PC to a Mac(love it btw)....and i was just wondering what i need to do so i dont lose everything on my iphone. i just imported all my music over, so i know when i plug my ipod in, it will just erase everything and replace it again, but i dont know what to do with my iphone. like what will happen with my apps, and i had a specific playlist in itunes on my old computer just for my iphone....will my "iphone playlist" on my iphone erase and ill have to recreate it?