Hi Rod,
First, I'm using the current version of zen, cherry zen template and a couple of other mods that I don't think would affect your mod. I don't know a lot about PHP yet, but a fair understanding of html, css. My shop isn't live yet. I had auspost installed, but completly removed it before installing this one.
Whew!

I don't know if this is a bug or something I did wrong. In the admin, I was getting a broken image (the little logo) obviously not important but I thought I would let you know.
To fix it I created a file structure similar to the one in auspost and uploaded an image. Funny thing was the file structure had to be..admin/DIR_WS_TEMPLATEStemplate_default/images/icons/ozpost_logo.jpg.
Was the only way I could get it to work.

I'm a bit fussy about astetics so I've been creating some new images and I'm also wanting to make some changes to the pop up window. I wanted to get the numeral (indicater of days shipping) to line up vertically with the center of the image that precedes it.
I also want to use the images, but have text for Days (Est' Delivery) Is that possible.
I know it seems trivial.

I'm guessing that there are some files already in zen cart that work with the ones you created, and perhaps one of them styles the pop up. Am I way off?

My store is at http://countrytothecore.net
You can log in as: [email protected]
use password: tester
There is a cart with an item in it for this user with two shipping addresses (one overseas) so you can see how it is looking.

Thanks for the mod and your time.
David