I have added customized genres in my PC ITunes database and also added playlists. I tried copying all music files plus the .m3u playlists from my PC via USB to the S3 and accessing it via DoubleTwist. the music is all there and plays, but customized genres are not recognized (only genres assigned by original publisher) and playlist does not show up. I tried with DoubleTwist on the PC itself and it failed to see any of this information before transfer. So that will not work. Any hope that there is a transfer program that will recognize the modifications in the ITunes database and transfer them to the S3?