I downloaded the New USPS module (most current). It gives me files to modify or upload. Looking at the instructions I'm not sure if the new files go in Admin or Catalog (which I call Store).
Here's the install instructions:
1. open folder "New_Files" and drop into your catalog directory, overwriting existing files. Here it says upload module.php There was no previous module.php in the Store directory but there is one in Store/Admin
2. open folder "Files_To_Modify" and use file comparing tool to change existing files (or follow instructions below). Files to modify starts with includes/classes/http.php Does that go in Store or Store/Admin? They both have an Includes folder.
Thanks,
Jack