REGEDIT4
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main]
"Search Page"="http://www.google.com"
"Search Bar"="http://www.google.com/ie"
[HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\SearchURL]
""="http://www.google.com/keyword/%s"
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Search]
"SearchAssistant"="http://www.google.com/ie"
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Save the above as a .reg file and doubleclick on it in Explorer.
Remember to include the REGEDIT4
I found this easier than installing the Google Toolbar and less crowding. See
http://www.google.com/options/defaults.html#default for a few more tips.
Another dodge is to add the Google URL to the C

Windows\Favourites\Links folder. Prefix this with full pathname of your IE file to get it to open in a new window.