This module is a replacement for the built-in captcha of OpenCart 1.5.x.

It's much better than the original for numerous reasons.

Installation:

1. Upload the contents of the 'upload' directory to your store's root.
2. Go to admin panel -> extensions -> modules ->reCaptcha - Contact & Review and click install.
3. Go to admin panel -> extensions -> modules ->reCaptcha - Contact & Review and click edit.
4. Input your public and private keys in the fields. If you don't have them you can get them here: https://www.google.com/recaptcha/admin

The module requires vQmod. No core file replacements.