Instead of having a internal entityId. Use mojang's entityid's but add one everytime you want it. Also allow fetching of the next entityid to be used

Plugins/Mineplex.Core.Common/src/mineplex/core/common/util/UtilEnt.java

@@ -33,7 +33,6 @@ import org.bukkit.craftbukkit.v1_7_R4.CraftWorld;
 
 public class UtilEnt
 {
-	private static int entityIdCount = 455000;
 
 	//Custom Entity Names
 	private static HashMap<Entity, String> _nameMap = new HashMap<Entity, String>();
@@ -574,6 +573,30 @@ public class UtilEnt
 
 	public static int getNewEntityId()
 	{
-		return entityIdCount++;
+		return getNewEntityId(true);
+	}
+	
+	/**
+	 * Use false if you don't want to modify the next entityid to be used.
+	 * 
+	 * Normally you want true if you want a unique entityid to use.
+	 **/
+	public static int getNewEntityId(boolean modifynumber)
+    {
+	    try
+        {
+            Field field = net.minecraft.server.v1_7_R4.Entity.class.getDeclaredField("entityCount");
+            field.setAccessible(true);
+            int entityId = field.getInt(null);
+            if (modifynumber) {
+                field.set(null, entityId+1);
+            }
+            return entityId;
+       }
+        catch (Exception ex)
+        {
+            ex.printStackTrace();
+        }
+	    return -1;
     }
 }