I have read many Centos webpages and mail archives but found only raw descriptions of the build process.

My first aim is to rebuild CentOS-6.4-x86_64-LiveCD.iso using the Centos repositories and preferably without recompiling the SRPMs, just to verify the build process.

My final aim is to create a Centos LiveOS contain the packages in CentOS-6.4-x86_64-minimal.iso plus some network configuration changes and some own executables preinstalled.

--- Only background, not part of the question ---

I tried to build a LiveOS on Centos6.4 x86_64 host using livecd-creator ( livecd-tools-13.4-2.el6.x86_64 ): LANG=C livecd-creator --config=centos-livecd-minimal.ks –fslabel=CentOS-minimal

centos-livecd-minimal.ks ( adapted from https://projects.centos.org/trac/livecd/browser/trunk/CentOS5/centos-livecd-... ) :

lang en_US.UTF-8 keyboard us timezone US/Eastern auth --useshadow --enablemd5 selinux --enforcing firewall --disabled

repo --name=a-base --baseurl=http://mirror.centos.org/centos/6.4/os/x86_64 repo --name=a-updates --baseurl=http://mirror.centos.org/centos/6.4/updates/x86_64 #repo --name=a-extras --baseurl=http://mirror.centos.org/centos/6.4/extras/x86_64 repo --name=a-live --baseurl=http://www.nanotechnologies.qc.ca/propos/linux/centos-live/x86_64/live

%packages bash kernel syslinux passwd policycoreutils chkconfig authconfig rootfiles comps-extras xkeyboard-config

%end

The generated .iso File fails to boot on a real and on a VirtualBox machine with a problem in the initial ramdisk :

dracut: Fatal: Don't know how to handle 'root=live:UUID=a68d794a-d777-4e4f-86ba-d2cc50d8fa1e' dracut: Refusing to continue Kernel panic – not syncing : Attempted to kill init