How do I get the storage controller working on Red Hat Enterprise Linux 4 Update 4 on the Fujitsu Siemens PRIMERGY RX200 S3?

This system needs 3rd party driver - megaraid_sas - to support the storage controller, which is provided by Fujitsu Siemens. Driver disks can be downloaded from ftp://ftp.fujitsu-siemens.com/pub/linux_drivers/ . The file to download is RedHat-ELx.0-drivers.zip.