Ioannis Vranos wrote:
Before CentOS 5 x86, I was using Scientific Linux 4 and they were keeping 4.x trees (e.g. 4.0, 4.1 etc) and for having an upgrade to the latest tree automatically, we were using a plug in or something
neither redhat nor us at CentOS intend to follow the sort of process that SciLinux has been following.