upgrading php 5.2.13 to 5.3

upgrading php 5.2.13 to 5.3

Cancelled

Job Description

Need help upgrading our php version. have a VPS and dont want to do this because never done it before. its a live VPS server so must be done with care.
running centos



this is whats installed:
Apache 2.0.63 Server Running
DirectAdmin 1.42.1 Running
Exim 4.72 Running
MySQL 5.0.90 Running
Named 9.3.6 Running
ProFTPd 1.3.3c Running
sshd Running
dovecot 1.2.15 Running
Php 5.2.13 Installed