The setPcoId allow you to set the order of playercontrolable objects
are used. For example, If you add more then 1 playerControlObject
to another playerControlObject, you can set which playerControlObject is associated with the number on the keyboard. setPcoID of 0 = the
first spot in that object.
Normally the order is generated automaticly by the order in which
playerControl objects are added to each other. But you can modifiy
that order with this property.