When Louis starts preaching on the beach from the Book of Mormon he selects Mosiah 4:18-19 which are verses from an address by King Benjamin concerning giving of food and other substance to the poor. These are very appropriate considering his own lack of substance.
In Carl's interview, Elder Banks quotes Alma chapters 22-24 from the Book of Mormon, in a specific doctrinal point exclusive to the Mormons: Someone can receive forgiveness since he/she had no idea he/she was committing a serious sin, such as murder, but only if the person receives the gospel with a commitment of dedicate his/her life to Christ, even if that means to die for Him.
The film does not mention it, but clearly describes Elder Lozano as a Colombian character, since he used to be a gang-member with his brother, a common case in Medellín, a Colombian city where the last name "Lozano" is very common.
A clip from "The Flyboys" plays when Todd turns on the television. In the DVD commentary, Richard Dutcher says he used a clip from "The Flyboys" Rocco DeVilliers. In return, Dutcher let Devilliers use a clip from "Brigham City".