"4) Upload all files in their respective directories." mean? What are their respective directories?
Download easypopulate zip file.
First make a folder on your computer named easypopulate.
Then KEEPING FOLDER strucures intact..extract contents of zip
to your newly created folder, using program such as winzip..
you should then have a folder
on your computer with structure as below..
easypopulate
/admin
/temp
/admin folder
should now have folder structure as below
/includes
easypopulate.php
You upload content of those folders into equivalent folders
of your zencart install..
BACKUP YOUR ZENCART STORE AND DATABASE BEFORE
INSTALLING EASYPOPULATE