I'm not sure why plan A didn't work. I have a video ipod which holds 30g and my son has a nano which holds a lot less. When he first got it I just unticked the music in itunes which I knew he wouldn't want (and wouldn't fit anyway) selected to only sync checked items, plugged his ipod in and downloaded my stuff onto his ipod. No problem. Since then we have installed itunes onto his own log in on the computer and we now run them separately. Not sure why that didn't work for you.