Virtualmin 3.74 on CentOS 5 - PHP/Joomla! No Write Permissions

Hello,

I installed Virtualmin 3.74 today on my freshly-imaged CentOS 5 VPS, I updated the system with 'yum update' before downloading and successfully executing the installer. The installation went smoothly, and I was able to log in, make virtual websites, edit DNS, etc... When I tried to install Joomla! however, whatever user PHP was executing in was not able to write (but could read) to the configuration.php file, I had uploaded and unzipped the files via ftp/ssh, and owner is mywebsite.mywebsite with all the 'proper' permissions.

I did some research but could not find anything helpful. I believe that the problem could be that PHP is not running using suEXEC as the mywebsite user, it therefore could not read/write as the owner. I need this feature really much, as that was the reason I decided to give up my hopeless dream of running my website using a self-designed software system w/ a package manager. =( I am lost without Virtualmin...

I am not seriously knowledgeable of how Apache/CGI runs under Linux, especially on RPM-distros (I would use Ubuntu, but the BIND server keeps crashing,..). I have installed Virtualmin on a freshly-imaged CentOS 5 image, disabled all mail-related plugins (since I will be using Google Apps Standard Edition) and have done nothing else, nothing else has gone wrong. I am not sure what the terms 'fcgi', 'mod_php' etc.. means, or what PHP is running under for that matter...

Thank you very much for your help! Complex Mind