I think I saw this done recently in Alan Berliner's "The Sweetest
). He used a lot of
archival family film shots at the beginning (the kind of strange
stuff you find at garage sales) and then ended the film with
something along the lines of "If you know any of the folks in these
films, contact me."
As for your question, I think that if the photos are from the
performer's personal collection, he (or his family) owns the rights.
When you say "studio shots," I assume you mean like a Sears studio
rather than Warner Bros. If the latter, you might need rights from
the movie studio.