Multitouch Android

Hey guys, I was looking for some help with this. I am making an android Fps and when i use a joystick to walk i can't hit the shoot button at the same time. I've heard of multitouch but don't know how i can implement it into my script. Does anyone know of a way to touch two gui textures at once? Thanks so much and this is the current script:

 var MFlash : GameObject;
 var bulletPrefab : GameObject;
 var spawnpoint : GameObject;
 var FlashPoint : GameObject;
 var speed : float;
 
 static var multiTouchEnabled : boolean;

 function Start(){
 multiTouchEnabled = true;
 }

 function Update (){
 if (Input.touchCount == 1)
         {
         var touch: Touch = Input.touches[0]; 
  
         if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
         {
          
         var flash = Instantiate(MFlash, (FlashPoint).transform.position, FlashPoint.transform.rotation);
         flash.transform.parent = FlashPoint.transform;
         var bullet = Instantiate(bulletPrefab, (spawnpoint).transform.position, spawnpoint.transform.rotation);
   bullet.rigidbody.AddForce(bullet.transform.forward * (speed));   
    }
    }
    }