The kernels are not repackaged. They are the stock standard centos/el kernels.
Name : kernel-smp Relocations: (not relocatable)
Version : 2.6.9 Vendor: CentOS
Release : 34.0.2.EL Build Date: Sat 08 Jul 2006 12:08:27 PM NZST
Install Date: (not installed) Build Host: v20z-i386
Group : System Environment/Kernel Source RPM: kernel-2.6.9-34.0.2.EL.src.rpm
Size : 28928126 License: GPLv2
Signature : DSA/SHA1, Sat 08 Jul 2006 02:20:35 PM NZST, Key ID a53d0bab443e1821
Packager : Johnny Hughes <johnny@centos.org>
Summary : The Linux kernel compiled for SMP machines.
Description :
This package includes a SMP version of the Linux kernel. It is
required only on machines with two or more CPUs as well as machines with
hyperthreading technology.