Oh, yeah, after checking and checking questions and answers I finally found the correct answer to my question that is here: http://answers.unity3d.com/questions/39269/disabling-a-script-mouselook I only need to do this:

GetComponent("MouseLook").enabled = !GetComponent("MouseLook").enabled;

and it works :), but thanks anyway for the other answer

its actually even more basic, it looks something like this:

var Player : GameObject;
var MainCamera : GameObject;

function Update () {

Player.GetComponent(MouseLook).enabled = false;
MainCamera.GetComponent(MouseLook).enabled = false;

}

No Problem ^^

So what exactly is your problem? Probably it doesn't know the Type of the c# script? Then try adding the C# script to the Plugins folder.