Your Fallout4Prefs.ini file should like it does above when done.
Find the section marked and add the following line: bEnableFileSelection=1.
First, Navigate to your "Documents\My Games\Fallout4" folder.
IMPORTANT: To have these mods work you must make some changes to a few. Before we get started, though, we'll have to change a few files to get mods working with the game, let's go over that below.