format the ipod. then using the ipod as her hd drag all the folders from her music library onto the ipod, again as a hard drive, not in i tunes. then on the mac, drag and drop all those files onto the hd of the mac and delete them off the ipod. fire up itunes and resynch with the ipod- it will format the ipod. then drag the entire folder of music straight into itunes and voila- you are done. if you dont follow drop me a pm and we can work through it step by step.