Tanax, go to your PHP Info page (probably http://127.0.0.1/?phpinfo=1 ) and note down the location of the php.ini being used (probably <wamp_path>/bin/apache/<apache_ver>/bin/php.ini ).

Stop the apache service (clicking the systray icon has the option to stop all services). Edit the line which says ";extension=php_curl.dll" in the php.ini file -- remove the semicolon. Save it. Start the apache service.

In theory, that should work (go back to the PHP Info page to see if curl is loaded) but no guarantees.