Change PHP Script to use AJAX instead of SOAP.

We have a PHP script that runs a meta search engine using Google, MSN, ASK and Yahoo. The Google? portion uses their SOAP API which has been discontinued by Google. The project is to have the script continue to work as before but with? the google? results coming from their newer? AJAX API. In addition to this we also require some fixes to the script to get rid of the function? register_globals and the script? domxml-php4-to-php5.php. We also require the script to be optimised to run faster.