If you teamed up with Elder Maxson to nuke the Institute, you may note that Preston Garvey will have a few choice words for you next time he reminds you how incompetent settlers are. With this file, just type "bat garveycomp" (without "_") into the console. This essentially tricks the game into thinking you sided with the minutemen and simply did'nt issue the evac order. However, Elder Maxson will carry on as before as if no change occurred. Win-Win.

ONLY WORKS IF BROTHERHOOD ENDING IS TAKEN!!!! ANY OTHER ENDING INVOLVES DIFFERENT QUEST OBJECTIVES AND THEREFORE A DIFFERENT COMMAND THAN IS INCLUDED IN THE BAT FILE!!! 

Installation: Place the .txt file wherever your fallout4.exe is located.