Just ran the integrity check. Only results are missing files in the ./install directory (which have been removed) and missing files in the ./themes/zetagenesis directory (which I am not using) and invalid ./themes/default/xoops-logo.png (which I have modified). All else comes through clean.

Could someone advise me on how to modify the content of the standard email messages sent by the system, e.g. greeting message which the systems sends out to new registered users, message to admins on new registration, etc. Where are the templates for these emails stored?

No confirmation code on the registration page - disclaimer text is followed directly by the Submit button.

The full non-commented content in my /class/captcha/config.php file is the following, which includes the line you referenced:

return $config = array(
"disabled" => false, // Disable CAPTCHA
"mode" => 'image', // default mode
"name" => 'xoopscaptcha', // captcha name
"skipmember" => true, // Skip CAPTCHA check for members
"maxattempt" => 10, // Maximum attempts for each session
"num_chars" => 4, // Maximum characters
"rule_text" => _CAPTCHA_RULE_TEXT,
"maxattempt_text" => _CAPTCHA_MAXATTEMPTS,
);

This was a brand new (for me the first) install. I'm stumped.

Yes indeed - captcha files are in /class/captcha directory. Directory consists of a "config" subdirectory and the following files: config.image.php, config.php, image.php, index.html, text.php, xoopscaptcha.php.

I do not see anything relating to captcha when running /modules/profile/register.php. Only Standard sections labeled Personal, Messaging, Settings and Community with my specific user information in each, but no confirmation code as questioned.

Successfully installed 2.3.2b for the first time. No problem with any modules, but I need CAPTCHA which did not appear to be included with the download tar file. Can anyone point me to how to add CAPTCHA to an installed and running 2.3.2b installation?