My question is how does one prevent itunes from making dupes all together though? What I do is once I import my mp3s to my imac, I open up itunes, add to library and then delete my original mp3s. Is this the proper way of handling my music? Even though I've been on a mac for 2 years now, I had a creative Zen Vision M on my Windows machine so I never used itunes as I do now especially with podcasts and my iphone. So I've been managing my music solely with itunes for the past month.