Add background to Andengine scene Android

I want to set my stage scene, but I do not know how to do it! I read a lot about it, but I can't do it. I start with Andengine, and it’s hard to find the exact information for my problem, everything is subjective.

Well, I implemented a screensaver in the scene and downloaded all the resources and scenes. (Https://sites.google.com/site/matimdevelopment/splash-screen---easy-way)

Then, I have to set the Background for my Scene menu, I think I need a TextureRegion and BitmapTextureAtlas to create each backgroud. I'm doing it:

Declared textures:

    //Fondo escenas
private TextureRegion menuBgTexture;
private BitmapTextureAtlas menuBackgroundTexture;

Load resources and load scenes (they are called onPopulateScene when Splash ends)

public void loadResources() 
{
    //FondoMenu
    menuBackgroundTexture = new BitmapTextureAtlas(null, 480, 320, TextureOptions.DEFAULT);
    menuBgTexture = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.menuBackgroundTexture, this, "menubg.png", 0, 0);
    //Cargamos los fondos
    mEngine.getTextureManager().loadTexture(this.menuBackgroundTexture);

}

private void loadScenes()
{
    //Menú
    menuScene = new Scene();
    final float centerX = (CAMERA_WIDTH - menuBgTexture.getWidth()) / 2;
    final float centerY = (CAMERA_HEIGHT - menuBgTexture.getHeight()) / 2;
    SpriteBackground bg = new SpriteBackground(new Sprite(centerX, centerY, menuBgTexture));
    menuScene.setBackground(bg);
    //menuScene.setBackground(new Background(50, 0, 0));
    //Options
    optionsScene = new Scene();
    //Juego
    gameScene = new Scene();
    //Pausa
    pauseScene = new Scene();
    //Gameover
    gameOverScene = new Scene();
}

load , loadScenes, :       SpriteBackground bg = SpriteBackground ( (centerX, centerY, menuBgTexture));

, (ISpriteVertexBufferObject), , ?