Its been a while since Linux VM Additions have been released, but there still is no good writup on how to install them. This is how I do it on a Red Hat install. (I used CentOS 5.2)
Download Virtual Machine Additions for Linux from Microsoft.
Install the msi file and it will add the iso that you need to Virtual Server 2005′s UI.
Mount the iso via the web UI.
Log into the Virtual Machine.
At a Terminal Type:
yum update kernel*
shutdown -r now
After a reboot open the terminal again.
yum install kernel-devel gcc
mkdir /media/cdrom
mount /dev/cdrom /media/cdrom
mkdir /usr/src/vmadd
cp /media/cdrom/*.* /usr/src/vmadd
umount /dev/cdrom
cd /usr/src/vmadd
rpm -ivh vmadd-kernel-module-RHEL-2.0-1.i386.rpm
tail -100 /var/log/vmadd-kernel-module.log | more # Verify the main install didn’t error.
rpm -ivh vmadd-heartbeat-2.0-1.i386.rpm
rpm -ivh vmadd-shutdown-2.0-1.i386.rpm
rpm -ivh vmadd-timesync-2.0-1.i386.rpm
/etc/init.d/vmadd start
/etc/init.d/vmadd-heartbeat start
/etc/init.d/vmadd-timesync start
/etc/init.d/vmadd-shutdown start
shutdown -r now
*NOTE
If you ever need to uninstall the additions, uninstall in this order:
rpm -e vmadd-heartbeat
rpm -e vmadd-shutdown
rpm -e vmadd-timesync
rpm -e vmadd-kernel-module-RHEL
EDIT
Once after a large amount of yum updates, the additions broke. To fix the problem, I uninstalled the additions, changed back to my src directory and reinstalled with the same commands. It fixed everything.