[CentOS] Request: Correct procedure on how to build a custom kernel on Centos

This topic seems to be a perennial question.  So I
don't ruffle any feathers like in
http://lists.centos.org/pipermail/centos-devel/2006-February/001400.html
could someone point once and for all to an
authoritative guide on a complete/proper/correct
procedure on building and installing a custom kernel
using the rpmbuild method rather than the traditional
method.

T.I.A.