[CentOS] Unattended install of CentOS in a VM with given login/password?

Is there a way to make CentOS install unattended, right from the boot
until I can SSH into it?.
I'd like being able to boot a new Virtualbox virtual machine right
from the CentOS ISO, and then from the Virtualbox host, ssh into the
brand new VM client and customize it using SSH shell scripts (SU, yum
install, etc).

Is there any way to tweak the ISO to specify "unattended install" and
the root password (to be later changed  after VM is installed).?

The main idea is turning this into a bash script so I can download
whatever new language and to the VM install "automagically".

Thanks in advance.

FC

-- 
During times of Universal Deceit, telling the truth becomes a revolutionary act
Durante épocas de Engaño Universal, decir la verdad se convierte en un
Acto Revolucionario
- George Orwell