SlowDown Player while in ZoomMode?

I'm using the Specific Weapon Zoom Resource and I've got basic "IronSights" animations per specific weapons.

Now my problem is I need to slow down the character for the specific weapons that go into the "IronSights" animation.

This is what I have so far:
commands.cs (called from the default.bind.cs IF the mounted weapon has a zoom)

function serverCmdCallZoomFunction( %client, %val )
{
   %curPlayer = %client.getControlObject();
   %curWeapon = %curPlayer.getMountedImage($WeaponSlot).item.getName();
   commandToClient(%client,'ZoomInDaBiatch',%val,%curWeapon);
   
   
if ( %val )
{
	
$Zoomed = !$Zoomed;

   if ( $Zoomed )
   {
   $Zoomed = true;
   %client.player.FocusedMovement();
   //echo("\c4FocusedMovement Called");
   }
   else
   {
   $Zoomed = false;
   %client.player.UnFocusedMovement();
   //echo("\c4UnFocusedMovement UNCalled");
   }
}

And this is what I have in the players.cs

function Player::FocusedMovement(%this)
{
//%this.maxForwardSpeed = 4;
//%this.runEnergyDrain = 2.9;
echo("\c4Player FocusedMovement SET");
}

function Player::UnFocusedMovement(%this)
{
//%this.maxForwardSpeed = 9;
//%this.runEnergyDrain = 0.9;
echo("\c4Player NormalMovement SET");
}

Though as you can see the actual code is commented out because it does not work, now I recently remember someone saying that you should not change Datablock values ingame so I believe this was the wrong way to go about anyway.

What would be an alternate way to correctly (multiplay compatible) slow down the character based on my given functions?