http://wiki.centos.org/TipsAndTricks/CreateNewInitrd
At step 1, MUST use CD/DVD with same architecture. i386 or X86_64 must be correct.
Also, at the last step, (tele)init 6 didn't work.
Needed to "reboot -f" instead.
Maybe these could be added to the wiki page ?
I'm sure to have a vested interest in the completeness of this wiki page !
So many thanks
- BG