The second thing is to add it to the email, which you could do with Universal Email or update it manually by updating the shipping_confirm.php page which is located under the WA_Universal_Email folder/Email_Templates folder. and the code you will need to add could be something like this:
<?php if(isset($_POST['customernote'])) { ?>
<p>Note to Customer:</p>
<p><?php echo $_POST['customernote']; } ?>
</p>
assuming you text field is called customernote.
Okay, so far I have gone into the Admin/orders_update.php and placed the following code after the tracking url field:
<p>
<label for="customernotes">Note to Customer:</label>
<input type="text" name="customernotes" id="customernotes" size="32" />
</p>
I have saved and uploaded the page, then go into the page online through Admin and the field doesn't appear on the page...
I do find an "Invalid markup" at the line: <div class="detailBox"> and the properties box says: Marked invalid because it is an overlapping or unclosed tag. If the display looks correct, it is safe to delete these tags."
The design view does show the Label and the field correctly. It just doesn't seem to upload to the site. I doublechecked my permissions and it is set to 755 for this page.