PHP upgrade on plesk ?

Hello,
How to upgrade php on Plesk 8.1.x ?

>>Make sure that you have YUM installed on your plesk server. If so then do the following steps
Step 1) Set up the atomic channel:wget -q -O - http://www.atomicorp.com/installers/atomic.sh sh
Step 2) Check all the updated modules version using >>yum update
Step 3) Upgrade the php to the latest version 5.2.x using the following command >>yum update php
Step 4) Replace the PHP 4 ini with PHP 5.2.x's (if applicable)mv /etc/php.ini.rpmnew /etc/php.ini
Step 5) Step 4) Replace the php.conf with the PHP 5.2 php.conf (if applicable)

mv /etc/httpd/conf.d/php.conf.rpmnew /etc/httpd/conf.d/php.conf

Thats all... :)