Example of using the pmproet_templates filter in the PMPro Email Templates addon to add your own email templates.

pmproet_templates.php

/*
	If you add this code into a plugin, then the PMPro Email Templates addon
	will allow you to set/change the body of the email through its UI.
	
	You can then send an email using this template using code like:
	
	$email = new PMProEmail();
	$email->template = 'my_email_template_name';
	$email->email = 'email@youaresendingto.com';
	$email->send();
*/
function my_pmproet_template_callback($templates) {	
	$templates['my_email_template_name'] = array(
		'subject' => 'My Subject Line',
		'description' => 'My Email Template Name',
		);
	
	return $templates;
}
add_filter( 'pmproet_templates', 'my_pmproet_template_callback');