[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