// This is my main class' annotations
@Mod( modid = "EntangleCraft", name="EntangleCraft", version="1.0")
@NetworkMod(
     clientSideRequired = true,
     serverSideRequired = false,
     clientPacketHandlerSpec = @SidedPacketHandler(channels={"EntangleCraft"}, 	packetHandler=ClientPacketHandler.class),
     serverPacketHandlerSpec = @SidedPacketHandler(channels={"EntangleCraft"}, packetHandler=ServerPacketHandler.class),
     connectionHandler = EntangleCraft.class,
     versionBounds = "[1]"
	     )
public class EntangleCraft implements IConnectionHandler{
	// main mod class, don't think you need to see anything here?
}


// I use this method in the ServerPacketHandler to send to clients:

	public static void sendAPacket(Packet250CustomPayload packet, ByteArrayOutputStream bytes){
		packet.channel = "EntangleCraft";
		packet.data = bytes.toByteArray();
		packet.length = packet.data.length;
		MinecraftServer server = ModLoader.getMinecraftServerInstance();
		server.getConfigurationManager().sendPacketToAllPlayers(packet);
	}

// And an example method in the ServerPacketHandler

	public static void spawnParticleToClients(double[] dest, String particle){
		ByteArrayOutputStream bytes = new ByteArrayOutputStream();
        	DataOutputStream DOS = new DataOutputStream(bytes);
        	try {
        		DOS.writeInt(4); // 4 for TP particle packet
			DOS.writeUTF(particle);
			DOS.writeDouble(dest[0]); DOS.writeDouble(dest[1]); DOS.writeDouble(dest[2]);
		} catch (IOException e) {
			e.printStackTrace();
		}
        sendAPacket(new Packet250CustomPayload(), bytes);
	}

// This gets called somewhere else in my code like this.
ServerPacketHandler.spawnParticleToClients(parametersHere);


// And in my client packet handler onPacketData I have simply got a System.out.println for now to make sure I get packets.
I don't :(