When you open common.php This is what you will see.
Just change what's in red and save.
Upload keeping everything intact.
Only change the copyright when a new year comes.
Bring up your site in your browser and mouse over your
bottom links and if you see your affiliate id in the link, that's it, your done.

This is the what's in the common.php When you open it.

<?
$copy = "2019";
$sitetitle = "Your Site Title Here";
$siteurl = "http://www.yourdomain.com Here";
$affiliateid = "affiliate Id Here";
?>

=================

Some sites have a contact form.

If your site came with a contact form, just open contact.php.

Open contact.php and below is what you will see in it. The red is where you change things only. Row 4 your email, row 5 your site title.

After you have changed the first 2 in red here scroll down, you can count down 80 lines to add to subject line. This is the subject that you will receive in your email to know where it is coming from.

<?php
// OPTIONS - PLEASE CONFIGURE THESE BEFORE USE!

$yourEmail = "youremail@.com Here"; // the email address you wish to receive these mails through
$yourWebsite = "Site Name Here"; // the name of your website
$thanksPage = ''; // URL to 'thanks for sending mail' page; leave empty to keep message on the same page
$maxPoints = 4; // max points a person can hit before it refuses to submit - recommend 4
$requiredFields = "name,email,subject,message,spam"; // names of the fields you'd like to be required as a minimum, separate each field with a comma

=================

After you have put in your details just save. After you have finished just upload keeping everything intact, that's it your done. Bring your site up in your browser and if you see the copyright date at the bottom, your site is setup right. You can place your mouse over an affiliate link to see if your id is appearing in the affiliate link. If the copyright or your affiliate id is not showing up it can only be in the common.php, recheck edit and save and upload the common.php and take another look at your site but refresh your site for the updates.

For any reason your site is not showing the copyright or your affiliate ids are not showing in the links, contact me on the site.

Thank you...