How to put both text and texture inside a label

I'm trying to do something like that : http://nsa34.casimages.com/img/2013/05/03/130503045447439504.png

But i can't reproduce the same, i've tried with GUIContent or different GUILayout.Label without success... I can't use GUI.Label and place the texture using the rect values because the windows is resized by the device resolution. Here is my actual code :

 GUI.skin = guiGuideUtilisation;
             GUILayout.BeginArea(new Rect(60, 70, Screen.width - 120, Screen.height - 140));
             GUI.Box (new Rect(0, 0, Screen.width - 120, Screen.height - 140),"");
             GUI.DrawTexture(new Rect(0,0,100,100),logoGuideUtilisation);
             if(GUI.Button (new Rect(Screen.width-166,25,25,25), buttonClose)) {
                 displayGuide = false;
             }
             guiGuideUtilisation.label.fontSize = 40;
             GUI.Label (new Rect(150,25,400,100),"Guide d'utilisation");
             guiGuideUtilisation.label.fontSize = 17;
             GUI.Label (new Rect(0,110,Screen.width - 120, Screen.height - 260), stringGuideUtilisation); // actually just displaying a string but this is where I want to use both text and texture
             GUILayout.EndArea();

Any idea ?

Thanks