Found a solution to avoid having to install MOOSE.

Now MOOSE can be copied into the mission file, but you'll need to
include a "do file" action of moose.lua in the mission file and copy the
rest of the MOOSE files to the MIZ file.

Moose/RouteTask.lua

@@ -0,0 +1,42 @@
+--- A ROUTETASK orchestrates the travel to a specific zone defined within the ME.
+-- @classmod ROUTETASK
+
+--- Modeling a sequence of STAGEs to fly back to the home base specified by an Arrival Zone.
+ROUTETASK = {
+  ClassName = "ROUTETASK",
+  GoalVerb = "Route",
+}
+
+--- Creates a new ROUTETASK.
+-- @tparam table{sring,...}|string LandingZones Table of Zone Names where the target is located.
+-- @tparam string TaskBriefing (optional) Defines a text describing the briefing of the task.
+-- @treturn ROUTETASK
+function ROUTETASK:New( LandingZones, TaskBriefing )
+trace.f(self.ClassName, { LandingZones, TaskBriefing } )
+
+  -- Child holds the inherited instance of the PICKUPTASK Class to the BASE class.
+  local Child = BASE:Inherit( self, TASK:New() )
+
+  local Valid = true
+  
+  Valid = routines.ValidateZone( LandingZones, "LandingZones", Valid )
+    
+  if  Valid then
+    Child.Name = 'Route To Zone'
+	if TaskBriefing then
+		Child.TaskBriefing = TaskBriefing .. " Your co-pilot will provide you with the directions (required flight angle in degrees) and the distance (in km) to the target objective."
+	else
+		Child.TaskBriefing = "Task: Fly to specified zone(s). Your co-pilot will provide you with the directions (required flight angle in degrees) and the distance (in km) to the target objective."
+	end
+	if type( LandingZones ) == "table" then
+		Child.LandingZones = LandingZones
+	else
+		Child.LandingZones = { LandingZones }
+	end
+    Child.Stages = { STAGEBRIEF:New(), STAGESTART:New(), STAGEROUTE:New(), STAGEARRIVE:New(), STAGEDONE:New() }
+	Child.SetStage( Child, 1 )
+  end
+  
+  return Child
+end
+