The SetName NWScript function should be included in NWN2 [1]. Currently however, this function does not exist in the pre-order toolset
// Set the name of oObject. // - oObject: the object for which you are changing the name (a creature, placeable, item, or door). // - sNewName: the new name that the object will use. // Note: SetName() does not work on player objects. // Setting an object's name to "" will make the object // revert to using the name it had originally before any // SetName() calls were made on the object. void SetName(object oObject, string sNewName="")
WARNING: This function is missing from NWN2 and thus any script which is imported that uses this function will fail to compile