How to manage Input from 2 - 4 Gamepads

here's the link to download : https://github.com/JISyed/Unity-XboxCtrlrInput
it's free and up to date (Unity 5.5) and well documentated ! And it works perfectly !
by the way: many thx to JISyed !

the only one prob i had was that the sensitivity of the joysticks handling was very very high. And wasn't to change in the editor. So i've left it to 1 in the editor and set a float
( steeringfactor) in my playerscripts like this

 using UnityEngine;
 using XboxCtrlrInput;
 .
 .
 .
 public XboxController playerNumber = XboxController.Second;
 
 // Turning
             m_currTurn = 0.0f;
             float turnAxis= XCI.GetAxis(XboxAxis.LeftStickX, playerNumber);
 
             if (Mathf.Abs(turnAxis) > m_deadZone)
                 m_currTurn = turnAxis * steeringfactor; // st_f = 0.175f 
 
 //for example how the same buttons are used
 // Booster
             if( XCI.GetButton(XboxButton.A, playerNumber) )
             {
                 boost = m_forwardAcl * PowerBoost;
 
                 m_body.AddRelativeForce(0 ,0,boost);
                 MaxBoost = MaxBoost-1;
             } 
 

I'm using a PS3 and XBox like gamepad. Both are little bit different in their own sensitivity and this way it' s pretty easy to adjust each pad.
I hope this will be helpful for any other user especially for beginners as i am still :)

yours