Thread:Project:Support desk/Google Custom Search Engine in Mediawiki

I am using MediaWiki 	1.17.0 PHP 	5.2.17 (cgi-fcgi) MySQL 	5.1.58-community-log

Wanted to integrate google customize search in my wiki. Tried this steps 1.generated code from google co-op 2.placed the code in extension folder by creating google-coop.php similarly as given in http://www.mediawiki.org/wiki/Extension:Google_Custom_Search_Engine 3. Where do I place  I am not getting this? and what should be next step.

Please help me...