Navigate the the location below in your registry.
The values listed are valid domains that IE will search for when a keyword is entered into the address bar.
To add another domain simply create a key named whatever is the next sequential number in the list and enter "www.%s.biz" for instance if you would like .biz domains to be checked. If you would like, you can also move this instance up in the list by renaming the key to a lower number in the list. For example, whatever is in the value of "1" will be checked first.
Key: [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\UrlTemplate]
Data Type: REG_SZ
