I had to copy all the music from the one ipod into the HD and then copy them onto the other iPod...
Not so sure Itunes imports tracks from the ipod, it may well do, but i couldnt find how...
I have to unhide hidden folders, and then went to the iPod in my computer, there is a hidden folder, then in there is a music folder, and then there are folders that have MP3's in them.