
Originally Posted by
JTheed
Go with the longer line. This mod was done under 1.3.9a and the longer line was added in 1.3.9d.
All right!
Since I have a few modules installed, it was easier for me to install the Add Shipping Telephone Module according to the template override system.
Therefore, I modified the structure of the directory tree in my installation and I have adjusted it in a way that it changes only 5 core files:
Code:
./admin/includes/classes/order.php
./admin/includes/functions/functions_customers.php
./admin/customers.php
./includes/classes/order.php
./includes/functions/functions_customers.php
The other ones are inserted as override files in the template system so it is easier to control them if they need changing or so:
Code:
./includes/languages/YOUR_TEMPLATE/english.php
./includes/modules/YOUR_TEMPLATE/create_account.php
./includes/modules/YOUR_TEMPLATE/pages/address_book/header_php.php
./includes/modules/YOUR_TEMPLATE/pages/address_book_process/header_php.php
./includes/modules/YOUR_TEMPLATE/checkout_new_address.php
./includes/modules/YOUR_TEMPLATE/checkout_address_book.php
./includes/templates/YOUR_TEMPLATE/templates/tpl_modules_address_book_details.php
./includes/templates/YOUR_TEMPLATE/templates/tpl_modules_checkout_new_address.php
Thank you again for this contribution. 
Kind regards,
orange_juice