Resposta,
Vou colocar apenas o script do NPC, o resto e so copiar de algum NPC existente e colocar o diretorio para o script...
Script:
<npc name="Nome do NPC" script="data/npc/scripts/script do npc.lua" floorchange="0" access="5" level="1" maglevel="1">
<health now="150" max="150"/>
<look type="134" head="115" body="10" legs="90" feet="115" corpse="2212"/>
<parameters>
<parameter key="module_shop" value="1" />
<parameter key="message_greet" value="Hello |PLAYERNAME|. Fala Aqui." />
<parameter key="shop_buyable" value="Speacial Backpack,ID,100;Special Hat,6096,10;Special Armor,2653,100;Special Legs,2157,100;Special Boots,ID,100;Special Shield,ID,100;Special Wand,ID,100;Special Sword,ID,100;Special Club,ID,100;Special Axe,ID,100;Special Star,ID,100;Special Addon,ID,100;" />
</parameters>
</npc>
Obs: Você deve usar um Mapa Editor para coloca-lo no mapa...