hi zoo, it's working fine with me.. use only the long url because it's the one that queries the search word.
maybe you didn't copy it all or maybe my url had an error, try again and this time just open the search engines tab, select 'minus google' and click the edit button
make sure to enter this url:
http://www.startupbin.com/google-google/search.php?cx=013624267394337592694%3A1i_jpk_znwu&cof=FORID%3A9&ie=UTF-8&sa=&q=test
it's a hyperlink this time searching the word 'test', open it in a new tab and copy the url from the addressbar, copy the whole string and paste it in the url for minus google, remove the test#726 part and make sure that the end string of the url is this:
&q=
hopefully this time it will work