technically you would have to give the peices of the prefab a target name. then assign them a variable. use

var hide(); 

to hide it. then use a waittill("trigger"); and then use the

var show();

by the way var is the variable name

ladder =getent ("piece","targetname"); //the parts of the prefab
ladder hide();
ladder_trigger ("trigger","targetname");//the trigger to make the prefab appear
ladder_trigger waittill("trigger");
ladder show();

Heya Killa,

Like n1 said, all pieces to the prefab would need their own targetnames (assuming that all peices also are script_brushmodels / script_models)

Best quick solution for this would be one trigger to a prefab, all targetnames on the prefab pieces being the same and have the trigger target that targetname such is targets all.

Hiding a script_brushmodel with ladder texture won't work since hiding is just making it invisible and not actually moving it else where and hopefully my hide show script example will help solve this.

I haven't tested this since I only just made it but with this you can like I said, set all pieces with the same targetname which then the trigger targets, However;
For the likes of ladder texture brushes add into the kvp:
"script_noteworthy"   "tool" = Which tells the script to hide it through origin setting
"script_vector"   "x y z" = This will be the hidden location however if not set it will hide it -50000 units under your map

With the script, when triggered it will bring it all back again.

hide_show_triggers()
{
	myTriggers = GetEntArray("my_trigger", "targetname");
	array_thread(myTriggers,::my_trigger_think);
}

my_trigger_think()
{
	if(!isDefined(self.target))
	{
		return;
	}
	else
	{
		myTargets = GetEntArray(self.target, "targetname"); 	// If there is multiple (brush)models with the same targetname, it needs to be arrayed)
		array_thread(myTargets,::toggle_hide); 					// Start by hiding everything
		self waittill("trigger", hero); 						// EAK!! Who's going to trigger it first HURRY UP!! The suspense is killing me
		array_thread(myTargets,::toggle_hide); 					// Show the (brush)models again
	}
}

toggle_hide()
{
	if(!isDefined(self.hidding_away) || self.hidding_away == false)
	{
		self.hidding_away = true;
		if(isDefined(self.script_noteworthy) && self.script_noteworthy == "tool")
		{
			self.original_location = self.origin; 				//Save the old origin so it know's where to place it back too
			if(isDefined(self.script_vector))
			{
				self.origin = self.script_vector;
			}
			else
			{
				self.origin = self.origin - (0, 0, -50000);
			}
			//Similler to disable_trigger (Infact never checked to see if it would work on this but for now...)
		}
		self hide();
	}
	else
	{
		self.hidding_away = false;
		if(isDefined(self.script_noteworthy) && self.script_noteworthy == "tool")
		{
			self.origin = self.original_location; 				// Bring it back to it's old location
		}
		else
		{
			self show();
		}
	}
}

Hope it helps, Like I said, I haven't tested it so, sorry if there is any syntax errors, may need to remove or add a bracket.

Thanks,
DuaLVII

Edit: The script allows for as many triggers and triggers targets as you want