How to Add Google Checkout to OpenCart

Open your browser. Type 'www.opencart.com/index.php?route=extension/extension/info&extension_id=18' into the address bar. Press the 'Enter' key.
Locate your version of OpenCart. Click on the 'Download' link next to your version.
Click on 'Save File' and 'OK' to save the file to your desktop. Wait for the file to download.
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