no hard disks were found for the installation

Hello,
I am trying to install Linux for my first time. after booting from the CD I get the following error…
“no hard disks were found for the installation”
I am guessing this is due to my hard drives being connect to a LSI Mega RAID SCSI 320 controller and I need to install some sort of drivers for them to be detected.
I have got to the “load IDE/RAID/SCSI modules” screen but am unsure what to do next ???
any help would be gratefully appreciated.

Thanks,
Steve.