As a follow up to Daniel’s previous post. If you want to change the default browser search engine in Firefox (say from .co.uk to com.au after you’ve installed the ‘proper’ English version of Firefox) it’s a simple procedure.
Type about:config in the address bar.
Scroll down the list to browser.search.default.url.
Double click on this and change .co.uk to com.au – you’re done. All your browser searches will now run through the Australian version of Google, with correct spelling.
And if you want to remove/add/edit the search options in Mycroft (the search box at the top of the screen) there’s a great free utility at http://www.svenbader.de/e_index.html