Install Guest Addition on CentOS 5

For CentOS 5.4.

First install the dev tools and kernel files:

yum groupinstall "development tools"
yum install kernel-devel

Setup KERN_DIR variable and run the addition setup:

export KERN_DIR=/usr/src/kernels/2.6.18-164.11.1.el5-i686/
sh VBoxLinuxAdditions-x86.run

Screen dump:

[root@centos5 cdrom]# KERN_DIR=/usr/src/kernels/2.6.18-164.11.1.el5-i686/ ; export KERN_DIR
[root@centos5 cdrom]# sh VBoxLinuxAdditions-x86.run
Verifying archive integrity... All good.
Uncompressing VirtualBox 3.1.4 Guest Additions for Linux........
VirtualBox Guest Additions installer
Removing installed version of VirtualBox Guest Additions...
Building the VirtualBox Guest Additions kernel modules

Your guest system does not seem to have sufficient OpenGL support to enable
accelerated 3D effects (this requires Linux 2.6.27 or later in the guest
system).  This Guest Additions feature will be disabled.

Building the main Guest Additions module                   [  OK  ]
Building the shared folder support module                  [  OK  ]
Doing non-kernel setup of the Guest Additions              [  OK  ]
Starting the VirtualBox Guest Additions                    [  OK  ]
Installing the Window System drivers
Installing X.Org 7.1 modules                               [  OK  ]

You appear to be running an older version of the X Window system in your
guest.  Seamless mode and dynamic resizing will not work!

Setting up the Window System to use the Guest Additions    [  OK  ]
You may need to restart the hal service and the Window System (or just restart
the guest system) to enable the Guest Additions.

Installing graphics libraries and desktop services componen[  OK  ]

Reboot to take effect.