Put a search field on your site. On submit, the variables are passed to google. The file captures the code of the google results page, breaks up the text, grabs only the results (minus the google header and footer) and displays it on your page.
ActiveSearch is complete search engine (kinda like google) and it features query highlight and links to the website that is related to the result. In the next version i will add the possibility to add your site like the other search engine
here are others i got;
# Google Search Engine Script
# SearchFeed Search Engine Script
# RevenuePilot Search Engine Script
# Server Hardware Information http://www.wwwsearchsolutions.com/products.php