Archiver - Requires PEAR.php

Hi, I'm abit confused about what I need to do to get the Archiver class I've downloaded to work. I'm running PHP 5 on Windows. I get an error - class 'PEAR' not found. I understood PEAR was included with PHP after v4.3.0. Is this correct? There is no PEAR.php on my machine. Please could you point me in the direction of what I need to download to get this to work. I think I must have to download something because the other option is to change the Include Path directive in the PHP.INI file - but at the moment I can't see anything helpful I could put in there. Thanks for your help, Stan ************************************************************************** Disclaimer This email transmission is confidential and intended solely for the person or organisation to whom it is addressed. If you are not the intended recipient, you must not copy, distribute or disseminate the information, or take any action in reliance of it. Any views expressed in this message are those of the individual sender, except where the sender specifically states them to be the views of any organisation or employer. If you have received this message in error, do not open any attachment but please notify the sender (above) and delete this message from your system. Please rely on your own virus check. Although all outbound mail is checked for viruses, no responsibility is taken by the sender for any damage rising out of any bug or virus infection. **************************************************************************