Hey guys, bought a used 3GS to use as a backup/second line and I'd like to sync it with my PC but I am worried. Currently, my PC install of iTunes is setup only with my iPhone 4, but at the same time, I'd still like to update/activate/etc the 3GS. Is it possible to do so without disturbing my settings with the 4 or can an iTunes library only be associated with 1 device (which I remember being the case at least in the past). Ideally, iTunes would recognize it is a new device and ask me what I want to do/what I want to sync as I don't want everything in my library sync'd to it as is done when I plug in my 4. Please let me know if this is possible and thanks in advance!