Script on Prefab is not changeable without changing all other instaniated objects

I'm sorry for crappy explanation but maybe by telling you whats happening and showing some scripts somebody would understand. I have these scripts attached to a bullet prefab which I instantiate on mouse down and have tried lots of things all of my methods are show because I turned them into comments. Heres the bullets script. Currently the bullets not moving and I think the problem may be I can't attach the public movescript move in the bullet script too an in scene object which is the player, how would I go about doing this.

     public EnemyScripts enemyscript;
     public MoveScript Move;
     //public GameObject Enemy;
     public Vector2 RightBulletVelocity = new Vector2 (30, 0);
     public Vector2 LeftBulletVelocity = new Vector2 (-30, 0);
     public GameObject mafia;
     public float speed = 30f;
 public bool BulletLeft =  false;
     public bool BulletRight = false;
     //Vector3 CurrPos = transform.position;
 
     //public GameObject block;
     // Use this for initialization
     public void BulletCheck (){
         if (Move.LookingRighty = true) {
             }
     }
     void Start () {
         Destroy(gameObject, 3);
         Debug.Log ("bullet has been shot");
         //CurrPos.x += 0.5f;
         //Rigidbody2D RB = GetComponent<Rigidbody2D> ();
         //RB.velocity = new Vector2 (speed, RB.velocity.y);
 
         //if (Move.LookingRighty == true) {
         //    Debug.Log("should be shooting right");
         //    BulletLeft = false;
         //    BulletRight = true;
             // transform posistion +.5
             //GetComponent<Rigidbody2D>().velocity = BulletVelocity;
         //} else {
             //GetComponent<Rigidbody2D>().velocity = BulletVelocity;
             //transform.posistion -.5
         //    BulletLeft = true;
         //    BulletRight = false;
         //    Debug.Log("should be shooting left");
         //}
         //transform.position.x += 0.5f;
         //transform.position = CurrPos;
 
         //transform.position.x += 1;
     }
     void OnCollision2D (Collision col){
 
 
          if (col.gameObject.name == "Enemy") {
             enemyscript.kill ();
             Destroy(gameObject);
         } else {
             Destroy(gameObject);}
     }
     // Update is called once per frame
     void OnBecameInvisible(){
         Destroy (gameObject);
     }
     void Update () {
         if (BulletLeft == true) {
             GetComponent<Rigidbody2D> ().velocity = LeftBulletVelocity;
             Debug.Log("bullet left = true");
         }
         if (BulletRight == true) {
             GetComponent<Rigidbody2D> ().velocity = RightBulletVelocity;
             Debug.Log("bulletright = true");
         }
         if (transform.position.x > mafia.transform.position.x + 15) {
             Destroy (gameObject);
         } 
         if (transform.position.x < mafia.transform.position.x - 15) {
             Destroy (gameObject);
         }
     }
 }

Heres my player script

 public void Shoot(){
         PlayerBulletScripts.BulletCheck ();
         if (LookingRighty == true) {
             Rigidbody2D bulletInstance = Instantiate(bullets, transform.position, Quaternion.Euler(new Vector3(0,0,0))) as Rigidbody2D;
             //bulletInstance.velocity = new Vector2(bulletspeed, 0);
             Debug.Log("looking right and shooting");
             PlayerBulletScripts.BulletRight = true;
             PlayerBulletScripts.BulletLeft = false;
             //PlayerBulletScripts.BulletCheck();
         }
         if (LookingLefty == true) {
             Rigidbody2D bulletInstance = Instantiate(bullets, transform.position, Quaternion.Euler(new Vector3(0,0,180f))) as Rigidbody2D;
             //bulletInstance.velocity = new Vector2(-bulletspeed, 0);
             Debug.Log("looking left and shooting");
             PlayerBulletScripts.BulletLeft = true;
             PlayerBulletScripts.BulletRight = false;
             //PlayerBulletScripts.BulletCheck();
         }
         Debug.Log ("shoot has been called");
 
 
 
     }