This table has all the templates for every instance. When a group enters an instance, a new copy of that instance is made from the values in these fields.
If you want to change the spot you will start in when you enter/leave an instance, go to areatrigger_teleport.
The map ID of the instance. (see Maps.dbc)
If the instance is a subinstance of another instance, this field has the parent instance's map ID.
The name of the instance script that the instance will use and apply (if any).