To install a new CentOS 5.6 server x64 / i686, Agilemail recommend the following steps.1. Download and burn to CD or mount the required ISOs. You will only need CD1 and CD3.centos.mirror.aussiehq.net.au/5.6/isos/x86_64/CentOS-5.6-x86_64-bin-1of8.isohttp://centos.mirror.aussiehq.net.au/5.6/isos/x86_64/CentOS-5.6-x86_64-bin-3of8.isoAll the ISO images are available on centos.mirror.aussiehq.net.au/5.6/isos/x86_64/Then during the installation process:2. You can SKIP the testing of the CD media step. This is not required.3. Make the logical selections for language, keyboard layout and timezone.4. Network should be set to a static IP address.5. Partition as required.6. Unselect ALL default software packages. 7. Choose to Customize Now the software packages. 8. Software packages, select: Base System, Base only. Unselect all others. 9. You should see a confirmation of the required media, CD1 and CD3. If not then go back a step. 10. Continue with the installation.Once the CentOS software has been installed:11. Login as root, run software updates, yum -y updateYou now have an up to date, minimal CentOS server ready for Zimbra installation.