Virtualmin allows you to host multiple domains on your CentOs 5 server (or any linux flavor supported by webmin - check out the list of supported distributions here).

You can also find more info at their website: http://webmin.com/vinstall.html

Get the link for the download and paste in Webmin > Software Packages > http line

or

Download the file: wbm-virtual-server-3.55.gpl-1.noarch.rpm or the current latest version to your local pc and then upload to your remote server.

Then from ssh shell, go to the directory where you uploaded the file and install.

See the images below to install via the Webmin http line.
Once installed 'refresh' Webmin modules.

Checking Virtualmin Install

Webmin > Servers > Virtualmin Virtual Servers > Re-check and refresh configuration

	If you see this Postfix Virtual map error see next page.