Welcome to Dreamviews Lucidity should help your girlfriend quite a bit in overcoming her night terrors.

You've probably figured this out already since you read the tutorials, but two of the most important things in working toward LDs are to keep a dream journal to practice dream recall, and to do frequent reality checks. Make sure the reality checks don't just become a mindless habit, or you'll find yourself doing them automatically in your dreams and then continuing on without becoming lucid. Stop and seriously question your surroundings each time you RC. Also, try to remember to RC right after you wake up, since you could have a false awakening. Try to record your dreams right after waking up as well, or you could forget important details.

Good luck to you and your GF