To give a bit more insight on what each section in the quest templates are for:
In-Game Text
This would be the little blurb you get when you look at the quest or mission in your log.
Description
This was text ported in from the current db quest. This can be re-written to be more general description of the quest, it's purpose, or in other cases a better guide than the one already in place.
Spoilers
All quest and mission cutscene transcripts should go here. Please try to sub-header this area with a very brief description of the cutscene.