Good copyright Info:

PhotoAttorney: "Registering Your Published Photos As a Group? There Is A Limit!
Copyright law changed in 2001 to allow you to group register images published in the same year (if they were made by the same photographer who also owns the copyrights to them) on one Form VA and for one registration fee. You also can include Form GR/PPh/Con (�Group Registration of Published Photographs Continuation Form�) with your registration to list each photograph by its title, date of publication, nation of publication, and description (optional). "