HI again!

I'm trying to add two additional text boxes in the Edit-Order.cshtml:

Courier Name 
Courier Tracking Code

 <tr>
                    <td>
                        Courier Name
                    </td>
                    <td>
                        <input type="text" value="@Model.Properties[ "courier_Name" ]" name="shipping_city" class="orderProperty" />
                    </td>
            </tr>
            <tr>
                <td>
                    Courier Tracking Number
                </td>
                <td>
                    <input type="text" value="@Model.Properties[ "courier_TrackingNumber" ]" name="shipping_city" class="orderProperty" />
                </td>
            </tr>

When saving the order do i have to capture these values and add them to the Order? Not sure where i do this, can someone point me in the right direction.

The idea is once admin has sent the order they can update the order with the tracking number and courier, move it to a new Shipped state which fires off an email to the customer.

That part works fine, however it's not sedning the new properties for Courier Name and Courier Tracking number.