DrawTexture GUI iPhone

So I have a main GUI scene, and I am drawing a texture with GUI.DrawTexture for the full background.
I then need to draw four touchable buttons, without using the GUITexture’s, since (i think) you can’t make them certain screen widths and screen heights.
I would make them GUI.Button, but once again (I think) you can’t make them touchable with iphones…
Any help would be great!
Ps. I work with javascript

GUI.Button works with iPhone… simply draw things in the right order
You can use GUIStyle to style your button with the textures for normal/active states and font
For Example:

function OnGUI()
   // draw background texture (iPhone 3GS resolution)
   GUI.DrawTexture(new Rect(0,0,320,460),myBackTexture);

   // draw a button
   if(GUI.Button(new Rect(20,20,100,50),"my button title",MyButtonStyle))
      // button touched do something