I just know to zip it and send it.
  I would make sure that both sides of the mission run like you want them to first.  I've noticed that I have to save-as/build mission/then save and resave to save to 'save-as' before my flights will even appear in the offline mission.  
Find A good file host too.  I use mediafire for now, I know that's not the most reliable source, but so far so good.
Good luck...