Step 1: Unzip the File and extract all files.

Step 2: Copy and paste all files into your Magento root directory. When prompted to Merge folders click “yes” for all.

Make sure all files transfer.

Step 3: Flush Magento Cache.

Go to System->Cache Management and Flush both the Magento Cache and Cache Storage.

and Reindex.

Go To System->Index Management and Select All and select “Reindex Data” in the Actions option and click “Submit.”

Developer Note : If you want to add the RapNet Instant Inventory Diamond Search on the navigation menu, we recommend that you do a URL rewrite. In order to create a URL rewrite follow the instructions here: https://www.magentocommerce.com/knowledge-base/entry/creating-url-rewrites