Update
Apparently I can use it. This is the error I get:
Warning: require_once(Mail.php) [function.require-once]: failed to open stream: No such file or directory in D:\hshome\c293604\wci.ericsxpress.com\webassist\email\PEAR_Mail_using_SMTP_php.php on line 113
Fatal error: require_once() [function.require]: Failed opening required 'Mail.php' (include_path='.:/cgi-bin/php/PEAR') in D:\hshome\c293604\wci.ericsxpress.com\webassist\email\PEAR_Mail_using_SMTP_php.php on line 113
The PEAR_Mail_using_SMTP_php.php uses this command on line 113 - require_once($mailObj->PearPath."Mail.php");
Can I remove PearPath. and edit it to read - require_once($mailObj->"path\to\Mail.php");