How to spawn a chest?

[NiLSPACE]

Try this:

World:SetBlock(Player:GetPosX(), Player:GetPosY(), Player:GetPosZ(), E_BLOCK_CHEST)

And afterwards if you need to access the chest you can use this:

World: DoWithChestAt(Player:GetPosX(), Player:GetPosY(), Player:GetPosZ(),
   function(chest)
      -- Do something with the cChestEntity like filling it up
   end
)