https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/1278956-custom-npcs
Installing a modpack using the Technic Launcher is easy. If you don't already have the launcher downloaded, visit our download page to get the latest version.
Type in the modpack name (vault/bunker) or paste the following url into the search box.
Finally, click Install at the bottom right of the launcher after you select vault/bunker from the list on the left. The launcher will handle everything else!
https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-mods/1278956-custom-npcs