Creeps Walk Trigger

I have a problem isolating a creeps walk trigger for my map I currently have this

Event

Time - Every 10.00 seconds of game time

Conditions

Heres where its confusing because I want all the units in the region to walk differently and I can't seem to find a way to declare the specific unit types without using triggering unit like this (Unit-type of (Triggering unit)) Equal to Ghoul

But this doesn't work since there is no triggering unit in the event.

Actions

Unit - Order (Triggering unit) to Move To (Random point in Monster Spawn 1 <gen>)

Again triggering unit doesn't work :/ and I can't specify a unit-type

My question is what can I use to specify so that it only effects the ghouls in the region and not the other units in the region also I can't define a specific unit already on the map because when they respawn if they're killed they won't walk.

Basically its like this

I can't seem to specify to the worldeditor to order the unit-type of ghoul to Move To (Random point in Monster Spawn 1 <gen>)

If this is complicated ask questions and I'll try to make it clearer. If this it too complicated to explain if you can make a test map and I'll comprehend it myself.

Unit Group - Pick every Unit Group and Do action.

When you select it, It'll say Units In Region, click on that, and change it to Units of Type.

--DoCa

Thanks that worked fine ^_^