The Basil Rathbone film wasn't a version of the Shakespeare play. It was simply a film that dealt with Richard III.Didn't care for the 20th century fascist update to Richard III, prefered the 30s Basil Rathbone one http://en.wikipedia.org/wiki/Tower_of_London_(1939_film) or Laurence Olivier http://en.wikipedia.org/wiki/Richard_III_(1955_film)
also really liked Kurosawa's Ran (King Lear) http://en.wikipedia.org/wiki/Ran_(film)
Great film, btw. Anything with Basil is magic.