Sorry, I can't find that tutorial either. I'll try my best to help. Commands that're helpful are listed below with a description.
Code:
#npcspawn create - Creates the NPC and adds its spawn.
#npcspawn add - Adds the NPC's spawn.
#npcspawn remove - Removes the NPC's spawn.
#spawnfix - Changes the spawn location of a mob, will not work unless you added then repopped the mob.
#npctypespawn [npc type id] - Spawns an NPC from the database, you can then add its spawn.