Collision damage with .difs

datablock WheeledVehicleData(Ron's Vehicle)
{
   maxDamage                = 500;
   destroyedLevel           = 490;

   minImpactSpeed           = 5;           // Impacts over this invoke the script callback
   softImpactSpeed          = 5;           // Play SoftImpact Sound
   hardImpactSpeed          = 15;          // Play HardImpact Sound

   softImpactSound          = SoftImpactSound;
   hardImpactSound          = HardImpactSound;
   wheelImpactSound         = WheelImpactSound;

   // Damage emitters, explosions and debris
   damageEmitter[0]         = LightDamageSmoke;
   damageEmitter[1]         = HeavyDamageSmoke;

   damageEmitterOffset[0]   = "0 2.5 -0.5";
   damageEmitterOffset[1]   = "0 2 -2";

   damageLevelTolerance[0]  = 0.3;
   damageLevelTolerance[1]  = 0.7;

   numDmgEmitterAreas       = 2;

   explosion                = GenericLargeExplosion;

   debrisShapeName          = "your debris path here";
   debris = ShapeDebris;

   renderWhenDestroyed      = false;
};

function WheeledVehicleData::onDamage(%this,%obj)
{
   %damageAmt = %obj.getDamageLevel();

   if (%damageAmt >= %this.destroyedLevel)
   {
         %obj.setDamageState(Destroyed);
   }
}

function WheeledVehicleData::damage(%data, %obj, %sourceObj, %position, %amount, %damageType, %momentum)
{
   %obj.applyDamage(%amount);
}

function WheeledVehicleData::onImpact(%data, %obj, %col, %vec, %speed)
{
   %obj.damage(%obj,%pos,( 2 * %speed ), "VehicleImpact");
}

function WheeledVehicleData::onDestroyed(%data, %obj, %prevState)
{
   // Create our explosion damage
   %damage  = 1000;
   %radius  = 10;
   %impulse = 10;
   %dmgType = "car damage";

   radiusDamage(%obj, %obj.getPosition(), %radius, %damage, %dmgType, %impulse);

   // Delete the destroyed vehicle
   %obj.schedule(100, "delete");
}