Spawning Custom NMS Entities Naturally

I'd like to apologize for possibly putting this in the wrong area. I'm new to the forum.

I have a custom NMS mob (Zombie) that I can spawn flawlessly. I need to be able to spawn this custom mob rather than spawning vanilla zombies. Is there any way of doing this? I have been researching all day but couldn't find anything.

Code:

public static void spawnCustomEntity(Location loc, String name)
    {
        net.minecraft.server.v1_7_R3.World nmsWorld = ((CraftWorld) loc.getWorld()).getHandle();
        if (name == "CustomZombie")
        {
            CustomZombie zombie = new CustomZombie(nmsWorld);
            zombie.setPosition(loc.getX(), loc.getY(), loc.getZ());
            zombie.setCustomName("Zombie");
            nmsWorld.addEntity(zombie);
        }
    }

Code:

public class CustomZombie extends EntityZombie
{

    @SuppressWarnings("rawtypes")
    public StandardZombie(World world)
    {
        super(world);
        List goalB = (List) Main.getPrivateField("b", PathfinderGoalSelector.class, goalSelector); goalB.clear();
        List goalC = (List) Main.getPrivateField("c", PathfinderGoalSelector.class, goalSelector); goalC.clear();
        List targetB = (List) Main.getPrivateField("b", PathfinderGoalSelector.class, targetSelector); targetB.clear();
        List targetC = (List) Main.getPrivateField("c", PathfinderGoalSelector.class, targetSelector); targetC.clear();
    }
   
}

P. S. I have tried to use CreatureSpawnEvent, but I couldn't find an effective way of replacing the vanilla zombie with the custom zombie without creating an endless loop of death

 

@Moody3939 You might want to take a look at this thread.
It is slightly outdated (but you most likely will find an update in the comments)

 

Thank's for such a quick reply. Unfortunately I was unable to find an update for that code. But I figured a workaround - I used CreatureSpawnEvent to check the ticks lived, spawned my custom zombie, and the set the ticks lived. Thanks for the help though!