help with GUI "Boost" button...

i am working on a arcade flight sim game for iPhone. I need to create a "boost" button that would boost speed of plane as button is pressed and return to normal as depressed (obviously). I have studied the script reference and gui reference but cannot get my head around it. here is button script...

function OnGUI () {
if (GUI.RepeatButton (Rect (Screen.width - 100,Screen.height - 50,100,50), "Boost!")) {
// This code is executed every frame that the RepeatButton remains clicked

}
}

i need that button script to increase this script below...

thisRigidbody.AddForceAtPosition( thisTransform.forward * 1000, forceThrust.position );

need to increase the "1000" integer when button is pressed...i do not have a throttle control, plane flies at constant speed when game starts, just want to add a little speed boost to help game play.

thanks for the assistance

 

Code (csharp):

1.  
2. private var isBoosted : boolean = false;
3. private var normalSpeed : int = 1000;
4. private var boostSpeed : int = 2000;
5.  
6. function OnGUI() {
7.   isBoosted = false;
8.   if (GUI.Button(Rect(...), "Boost!") {
9.     isBoosted = true;
10.   }
11. }
12.  

Then, in the Update() / FixedUpdate() / where ever you apply your forces,

Code (csharp):

1.  
2. var speed : int;
3. if (isBoosted) {
4.   speed = boostSpeed;
5. } else {
6.   speed = normalSpeed;
7. }
8. thisRigidbody.AddForceAtPosition( thisTransform.forward * speed, forceThrust.position );
9.  

 

thank you!!!

 

thanks for help, still having issues, i sent you a PM.