It's interesting to hear how Enix extended the music by adding a reprise of the Alefgard overworld theme, followed by a third verse of the ending. This was done to add the English localization team to the credits, since the original music would just abruptly end once the Dragon Quest III staff list ended and the Dragon Warrior III staff began.
Actually Christians do not use the Cross in their worship, because it's believed that Jesus Christ did not die on a cross. Sorry I cannot express these ideas in Japanese fluently, though I can read what's written in the reply. If someone can help translating it will be pretty much appreciated.