I am having all kinds of problems installing FC4 on a Dell Optiplex GX620. When I try and use the FC4 CDs, it fails to find the hard drive. The controller is the on board Intel SATA controller. I know the hardware works fine because I can install FC3 on the Dell and it works as long as the BIOS is configured for combined mode. If I do a yum update, the latest FC3 kernel fails to boot.