Click the wrench icon to the right of the address bar and select "Options."

Click the "Manage" button in the "Default search" section of the Basics tab.

Click "Add" in the top right of the window.

Fill in the fields with this information:
Name: Cuil
Keyword: c
Address: http://www.cuil.com/search?q=%s

Click "OK" to close the dialog. Then click "Make Default" located on the right-hand side of the window.

Click "Close" to close the "Search Engines" window, and click "Close" again to close the "Google Chrome Options" window.
Cuil will now be used as the default search engine in Chrome.
Make Cuil the default search engine in your favorite browser.
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