I'm trying to add music to my iP4 using my computer (main) and my GF's. So I started to use my GF's computer and added the music I wanted...at first itunes warned me that I needed to erase and sync using one library. I clicked ok, because there was nothing on my phone at the time. So I added all the music, now, I want to add music using MY computer but that same dialog box pops up warning me that it will delete my music I just recently added. I googled this and it seems like many people changed their library file settings, etc...but I dont want to do this. It was so simple on my touch just to click "manually manage music" but now its all complicated! Anyone have any suggestions or solutions to get over this? Thanks!