DAE texture swap

Is it possible to dynamically change the texture on a DAE instance? 

I’ve tried updating the materials MaterialList:

var texture:Bitmap = new LaptopTexture() as Bitmap;

                  var newMaterialList:MaterialsList = new MaterialsList();

                  newMaterialList.addMaterial(new BitmapMaterial(texture.bitmapData, true));

                  myDAE.materials = newMaterialList;

I also tried re-loading the DAE, and supplying my own materials list:

                  var texture:Bitmap = new LaptopTexture() as Bitmap;

                  var newMaterialList:MaterialsList = new MaterialsList();

                  newMaterialList.addMaterial(new BitmapMaterial(texture.bitmapData, true));

                  myDAE.load(new DaeModelData(), newMaterialList, true);

And also tried working through the SkinController:

var texture:Bitmap = new LaptopTexture() as Bitmap;

                  var newMaterialList:MaterialsList = new MaterialsList();

                  newMaterialList.addMaterial(new BitmapMaterial(texture.bitmapData, true));

                  var myControllers:Array = myDAE.controllers;

                  var i:int;

                  var loopUntil:int = myControllers.length;

                  var skinController:SkinController

                  for(i=0; i<loopUntil; i++)

                  {

                        if (myControllers[i] is SkinController)

                        {

                              skinController = myControllers[i];

                              skinController.target.materials = newMaterialList;

                              skinController.update();

                        }

                  }

Am I going about this completely wrong?

Jonathon