[ Thanks to Falko
Timme for this link. ]
“CentOS 6.0 Network Installation (CentOS 6.0 NetInstall) is
basically installing from a very small downloaded ISO image which
downloads the needed files to complete the full operating system
installation on-the-fly. This tutorial shows the process of
installing CentOS 6.0 using the HTTP NetInstall method. This method
is much faster for basic systems since you don’t have to download
ISO files or one huge DVD based ISO just to get started. If you are
installing many systems you may want to look into the stand-alone
DVD as it will save time in the end”