When creating a modification using a product, you can also use this method in a plugin.
Choose 'Cache_templates' and put the PHP code as:
PHP Code:
$variablename[] = 'templatename';
For example, when creating a template called 'booyar' and you use $booyar to call the template, you can add a plugin with:
PHP Code:
$booyar[] = 'booyar';
Hehe

Nice tutorial

Good job ^_^