Thank you @casiepa.
I decided to start coding according to your advice in ONE theme.
But in order to succeed the plan, I have to understand each functions and roles of .php-files which run in bbpress.
Could you please give me any picture that explains order of files and functions called and executed by ‘the_content()’ in bbpress.php inside WP theme directory.
I would like to know what happens in bbpress after the_content() runs.
