[iBook] migration assisant

[JoeTomeo]

I have an  ibook and an emac both using osx 10.4.8. I would like to  
us my older mac (emac) as my backup.  Thus I would like to transfer  
files FROM my IBOOK TO my EMAC using migration assisant . I do have  
the firewire cable required, but directions in help section have me  
confused as to which files can be transfered as well as proper  
procedure. Any help would be appreciated.