[CentOS] Source Device Driver during installation in CentOS 6

Hi,

I have loaded CentOS 6 on HP DL 180 G6 2U Server. How do i source
device driver during installation. When i boot the system using
CD/DVD, i do not see boot : prompt instead it says "Enter" and then
select the installation method. Basically how do i force the installer
to type linux dd at boot prompt.

Please guide.

Regards

Kaushal