To perform a text based install of Centos, press Tab while Install or upgrade an existing system is selected, per the below:
Then a line of text will appear at the bottom beginning with vmlinuz per the below:
Go to the end of the line and enter the word text then hit Enter. You will then see the familiar screen:
Proceed with your text based install to your heart’s content!
How can I install Centos 6 without the gui?