You need set up an AddressSearch Alias for each search engine before you can use it with AddressSearch. You can do that here.
For example, you set gg to be the AddressSearch Alias for Google and you want to search for Search Bar Pro. Then in the Address bar of Internet Explorer, type sbp:gg?Search Bar Pro. It should look something like this:
Then just press the enter key and the Search Bar Pro will perform the search for you. If you have the setting to add searches to the history in the Integration tab enabled, then it will be added.
You can use search engines and URL's with AddressSearch, but not search groups.