REGEDIT4

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes]
"DefaultScope"="{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFF03}"

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes]
"Version"=dword:00000001

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes\{{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFF03}]
"DisplayName"="Yahoo!"

[HKEY_LOCAL_MACHINE\Software\Microsoft\Internet Explorer\SearchScopes\{{FFFFFFFF-FFFF-FFFF-FFFF-FFFFFFFFFF03}]
"URL"="http://search.yahoo.com/search?p={searchTerms}&ei=UTF-8"