Script Problems?

Hello, i have this script but i want it to not be gui. so can you guys help me convert this into the 2d toolkit sprite so it will let me put sprites in there instead of gui thanks.

#pragma strict
var health3 : Texture2D;
var health2 : Texture2D;
var health1 : Texture2D;

static var LIVES = 4;

function Update (){
	case 3:
	guiTexture.texture = health3;
	case 2:
	guiTexture.texture = health2;
	case 1:
	guiTexture.texture = health1;
	case 0:

What you can do is use planes, and then define the plane size, position, color, picture, etc. through your script. This would eliminate the need for OnGUI()