I have been trying different ways to get this code for a couple of days now. No matter what I try it's been throwing errors left right and centre, usually about splat-maps being null. The terrain is generated from an instantiated prefab with this script attached. The inspector is set with all of the pieces in place but it still doesn't work. Can someone please tell me where I'm going wrong.

var Tex1Txt : TextAsset;
var Tex2Txt : TextAsset;
var Tex3Txt : TextAsset;
var Tex4Txt : TextAsset;

var Tex1= new Texture2D (1024,1024);
var Tex2= new Texture2D (1024,1024);
var Tex3= new Texture2D (1024,1024);
var Tex4= new Texture2D (1024,1024);
Tex1.LoadImage(Tex1Txt.bytes);
Tex2.LoadImage(Tex2Txt.bytes);
Tex3.LoadImage(Tex3Txt.bytes);
Tex4.LoadImage(Tex4Txt.bytes);

var TerrData : GameObject;
TerrData = GameObject.Find("TrainTerrainPrefab(Clone)");
TerrData.GetComponent("TerrainToolkit").FractalGenerator(0.25, 0.25);

var slopeStops : float[] = [20.0, 50.0];
var heightStops : float[] = [0.2, 0.4, 0.6, 0.8];
var textures : Texture2D[] = [Tex1, Tex2, Tex3, Tex4];

function Awake () 
{   
    TerrData = GameObject.Find("TrainTerrainPrefab(Clone)");
    TerrData.GetComponent("TerrainToolkit").FractalGenerator(0.25, 0.25);
    TerrData.GetComponent("TerrainToolkit").TextureTerrain(slopeStops, heightStops, textures);
}