Not much of a how-to, but after much trial and error I came up with this.
Open console as root and paste this command:
cat > /usr/lib/firefox-2.0.0.6/searchplugins/vectorlinux.xml << EOF
<SearchPlugin xmlns="http://www.mozilla.org/2006/browser/search/">
<ShortName>VectorLinux Forum</ShortName>
<Description>Search VectorLinux Forums</Description>
<InputEncoding>ISO-8859-1</InputEncoding>
<Image width="16" height="16">data:image/x-icon;base64,AAABAAEAEBAAAAEACABoBQAAFgAAACgAAAAQAAAAIAAAAAEACAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAjAAAAIQEAACEAAAAhEEAAIQkAACEIAAAlAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD///8AAAAAAAAAAAABAAAAAAAAAAAAAAAAAAABAQAAAAAAAAAAAAAAAAABAQEAAAAAAAAAAAAAAAAABgEBAAAAAAAAAAAAAAAAAQEBBwEAAAAAAAAAAAAAAAEBAQEBAAAAAAAAAAAAAAEBAQEBAQAAAAAAAAAAAAEBAQADAQEBAAAAAAAAAAEDAQAAAQEBAQAAAAAAAAABBgAAAAADAQEAAAAAAAABAQQAAAAAAQEBAQAAAAAAAQMEAAAAAAEBAQEAAAAAAAEBAQAAAAAAAQEBAQAAAAABAwEDAAAAAAQBAQEFBQAAAAIBAQEBAAAAAQEBAQAAAAAAAQEBAAAAAQEBAAAAAP9/AAD+fwAA/H8AAPx/AAD4PwAA+D8AAPA/AADiHwAAxh8AAM8fAACPDwAAjw8AAI+HAACHgQAAwcMAAOOPAAA=</Image>
<Url type="text/html" method="post" template="http://www.vectorlinux.com/forum2/index.php?action=search2">
<Param name="search" value="{searchTerms}"/>
<Param name="submit" value="Search"/>
<Param name="advanced" value="0"/>
</Url>
<SearchForm>http://www.vectorlinux.com/forum2/</SearchForm>
</SearchPlugin>
EOF
Noooo... The long line is not a typo.
Restart Firefox
Done

You will find your new VectorLinux Forum search and icon in the top right drop down box.
Enjoy
