Extra Internet Explorer 7 search providers list (IE7).... They are listed as IE7 search providers but most (probably all) will work on IE8.
To use the Search providers simply click on the name from the list below and follow the instruction in the pop up to added it to your search box.
http://tredosoft.com/internet_explorer_7_search_providers#
Adding Your Own Search Provider.....
If your search provider does not provide a direct way for you to add it as a search provider, you can still add it manually.
To create your own search provider, go to the Windows Search Guide page and follow the instructions.
http://www.microsoft.com/windows/ie/searchguide/en-en/default.mspx?dcsref=http://runonce.msn.com/runonce2.aspx