How Do I set Up the Verification Code ?

Greetings-

I've just downloaded the new version of DigiOz Guestbook (1.7.1) What files do I access to set up the verification code? I did a search of all files and cannot find any that contain words like:

security
verification
verify
etc.
etc.

Thanks for helping the newbie.

Smobro1

To enable image verification:

1- Open the file "config.php" using notepad.
2- Find the following line (line 29):

Replace it with:

That's it! Enjoy the guestbook.