Your Fallout4Custom.ini should look like this:
And if i´m not completly wrong you simply drag and drop the files manually or use the NMM to add and install the mod. If you use the NMM the .esp is automatically checked, otherwise do it yourself, either in the NMM or in the Mod Menu ingame. Type help "insert item name here" 4 to look up the items and you should get the item ids to add them in your game via console command. If it still not works it is probably a mod conflict, so try to remove some and figure out which one conflicts.