On three ocasions itunes has delected my library and i'm having to create smartlists etc again and again.

Does anybody know if it's possible to copy smartslist directly from the ipod and place them back into Itunes?

or even synchronize what i have on my ipod with whats on my hard drive?? so everything that's on the ipod comes restores back onto my hard drve?? including most of all playlists?