Upgrading PHP 4.3.1 to PHP 4.3.4

Hi, I have been given a task by my management to upgrade PHP 4.3.1 to PHP 4.3.4 on a RedHat Linux 7.0 which has Apache and Mysql. The guy who had installed and was managing is no more with us. I don't have any idea about how it was installed and in which mode. Any help will be appreciated. Following is the output from phpinfo.php System Linux dwb 2.2.16-22smp #1 SMP Tue Aug 22 16:39:21 EDT 2000 i686 Build Date Apr 9 2003 15:39:04 Configure Command './configure' '--with-mysql=/usr/local/' '--with-config-file-path=/web/conf' '--with-apache=../apache_1.3.27/' '--enable-track-vars' Server API Apache Virtual Directory Support disabled Configuration File (php.ini) Path /web/conf/php.ini PHP API 20020918 PHP Extension 20020429 Zend Extension 20021010 Debug Build no Thread Safety disabled Registered PHP Streams php, http, ftp MJ