I need help in triggering the quest "Diplomatic Immunity". I tried talking to Delphine back in Riverwood but she doesn't say anything about this quest. Now I had the same problem with the previous quest (A blade in the dark) but only in the end where it says "Talk to Delphine". I used a console command to end the quest so Delphine would return to Riverwood. Now whenever I try to talk to her, nothing triggers. I tried using console commands like setstage and completequest, but nothing seems to work. Is there a way to extract the main quest files and put them in data? that way the game would be forced to trigger them.
