The short, yes.
The extended version you'll only find on DVD and LQ
Your config file should be the first place you learn about when messing with a server. This is where you set things up to run right, it's the background, it's what gives the face to your applications. For Apache, your config file is going to be somewhere around /etc/apache2/conf or nearby if that isn't the exact location. The conf file will be called commonapache2.conf OR apache2.conf depending on what's going on and how things are set up. You should be able to find similar entries to those listed above and add them accordingly. These are the necessary lines:
LoadModule php4_module modules/libphp4.so
# Set it to handle the files
AddType application/x-httpd-php .php
AddType application/x-httpd-php .phtml
AddType application/x-httpd-php .php3
AddType application/x-httpd-php .php4
AddType application/x-httpd-php-source .phps
The others are optional. You will likely have to install another rpm or 2 in order to get things working. mod_php I believe is the name of 1 of the other files, and the other is likely a dependency of that file.