I found this story interesting when it was first both introduced as the real thing and then discredited, because I really am very interested in the "history" of James, brother of Jesus, and the first church in Jerusalem, and how it was superceded by Paul and the Gentile church. James was supposedly a very important figure in Jerusalem of his time, and mentioned outside of church mentionings (but everything is suspect).
I remember most telling my Catholic-raised wife about the box and James and her retort was "Jesus HAD BROTHERS?"