Hey guys. I'm a proud owner of a new macbook pro. What I have done is transferred all of my mp3s from my old PC to my new MBP via external hard drive. Everything copied fine to the MBP, but I just have a few questions. I'm used of winamp (opening the mp3 files and they play). When I open up my mp3s now, I know it goes into iTunes, but what exactly is happening? Is it duplicating my mp3 files? I know I am able to delete the files from the iTunes library without deleting the actual file. Do most people just import their entire mp3 collection into iTunes? Say I do import my entire collection. Is it then okay to delete all of the original mp3s. Someone please explain! Thanks.