I too noticed something different about the authoring of Farsight's ESB & ROTJ, compared to Farsight's ANH.
ESB & ROTJ will not AutoPlay when inserted into my standalone player. Instead my screen turns all white.
However, if I press the Menu button ( Farsight set don't have menus, as Rik mentioned above)
but if I press the Menu button my white screen goes away and DVD player logo returns.
Now I can press Play button and the movies will start. (ANH will AutoPlay upon insertion, just like normal.)
Try all the buttons ! Maybe your player can be coaxed into playing them, as mine was.
Farsight and DrGonzo are two different sets (as others have already noted)
------Edit
oops, I should have refreshed my screen to see you've already got the answer !