Make a google module for your search engine
After having suffeciently tested your search engine, you can go ahead and make your google module. You can either create a "Custom Search Gadget" using the facility offered by google or make your own by pasting your CSE's code into the content section. To add the one created for you by google you can visit your search engine homepage and click on the add to google page. You can then use your search engine from your google homepage itself.