You have to downgrade Fallout 4 to before next-gen version to be able to install Fallout London. You can use a mod to do it, or manually by using the Steam console to ...

Once you are done backing up, you need to edit a couple of.ini files named ‘Fallout4.ini’ and ‘Fallout4Prefs.ini’. Both these files are located in the first directory above. After finding these files, ...