[CentOS] ata_piix

Hi all

I am using cents 5.3 on a gigabyte motherboard MA78GM-US2H.
When installing centos using kickstart I get prompted to load a driver. 
I select the ata_piix driver
and everything continues as normal.

Is there a way in kickstart or the boot command prompt line to specify 
loading the ata_piix module automatically?
Why isnt the kernel loading it automatically? I dont recall having to 
ever do that before in 5.2

Thanks,

Jerry