First off, thanks to all of you for figuring out the solution. It's a big help to many of us, greatly appreciated!

I've packaged the files in an "official" module that I will upload to the main contribution page (so others can easily find it).

This version includes the latest usps_autofill_button.php file, as well as adjustments to orders.php to include the latest security fixes for zc1.3.9 and zc1.5.0. I also cleaned up the install/read me instructions.

As far as I can tell, it works flawlessly. Please check it out and let me know if there are any issues. If not, I'll upload to the Add-ons section.

http://jtwebsitedesign.net/zen/USPS....-fill-v1.5.zip