1 Install Media
The install media(s) are available at http://isoredirect.centos.org/centos/5/isos/i386/. I used the DVD-image for this howto.
2 Installation
Hit “Enter” to start the installation.
Test your install media if you want.
The installation wizard is starting.
Select your language and proceed.
Choose your keyboard-layout and proceed.
Here you can select/edit the partitioning layout.
If you chose the manual setup, you’ll see the following two windows.
Here you can adjust the network settings.
Select the location nearest to yours and configure the clock. Unmark the checkbox if there are other operating systems installed, that expects the clock to be set to local time – e.g. Windows.
Choose a password for the root-account and confirm it.
Here you can select predefined collections of software. You can also make a custom selection if you mark the corresponding radio button.
Select “Packages from CentOS Extras” – a window will pop up, asking for your network configuration. If you have already configured your network settings simply commit it – otherwise configure the settings now.
If you chose the custom selection you’ll see this and a few following windows. Select a main group on the left and afterwards one of its subgroups on the right. Now click on “Optional Packages” – you’ll see…
…this window with a detailed package list. Select or deselect packages as you like.
Click “Next” if your selection is complete. Dependencies are being checked.
The system is ready to install – click on “Next”.
The partition(s)/disk(s) are being formatted etc.
The system is being installed.
The installation is complete. Remove the install media and reboot the system.
If there’s no reason to do something special wait a few seconds to start with the standard settings.
The system is starting up.
This is the first start – the firstboot-wizard appears.
Here you can edit the firewall settings if you want. If you’re not planning to connect to this computer via ssh/scp/sftp etc you can close the corresponding port.
I recommend to deactivate SELinux – it can cause many problems, especially if you’re using software from additional repositories.
A reboot is required to make the changes effective.
Set the actual time and date.
If you enable the network time protocol, the time will be synchronized with a remote time server.
Time to add the first user-account to the system.
The system will test your soundcard (there was no soundcard added to this vm).
Here you can add software from additional CDs. Afterwards click on “Finish”.
The system has to reboot now.
When the system is up again, you’ll see the login window. Log in to the system with the userdata you chose in the firstboot-wizard.
Welcome to your desktop.
In various parts of this howto you have to switch to the root-account (within a terminal). The terminal is available in the gnome applications menu.
DrUnGeN 
