Regarding the photo question once more, if a museum hires someone
    under the term "work for hire," or the individual is employed by
    the museum full-time, then the copyright issue gets vague.  I say
    vague because arts law always favors the creator of the image, no
    matter who possesses the film.  If you wish to own the copyright
    to images taken by a photographer, secure those copyrights through
    a contract drawn up by an attorney--then it is a done
    deal--there is no other sure way.   The American Law Institute
    sponsors wonderful workshops on copyright and other important
    museum issues--ALI-ABA (American Law Institute - American Bar
    Association) holds conferences all the time--they are pricy, but
    well worth it.