Transaction Check Error:   package kernel-2.6.18-1.2798.fc6 is already installed
  file /boot/System.map-2.6.18-1.2798.fc6 from install of kernel-2.6.18-1.2798.fc6 conflicts with file from package kernel-2.6.18-1.2798.fc6
  file /boot/config-2.6.18-1.2798.fc6 from install of kernel-2.6.18-1.2798.fc6 conflicts with file from package kernel-2.6.18-1.2798.fc6
  file /boot/symvers-2.6.18-1.2798.fc6.gz from install of kernel-2.6.18-1.2798.fc6 conflicts with file from package kernel-2.6.18-1.2798.fc6
  file /boot/vmlinuz-2.6.18-1.2798.fc6 from install of kernel-2.6.18-1.2798.fc6 conflicts with file from package kernel-2.6.18-1.2798.fc6