$ cat /etc/cobbler/import_rsync_whitelist 
# RHEL/CentOS/SciLinux
+ /RedHat/
+ /RedHat/RPMS/
+ /RedHat/rpms/
+ /RedHat/Base/
+ /Fedora/
+ /Fedora/RPMS/
+ /Fedora/rpms/
+ /CentOS/
+ /CentOS/RPMS/
+ /CentOS/rpms/
+ /CentOS/
+ /Packages/
+ /Server/
+ /Client/
+ /SL/
+ /images/
+ /images/pxeboot/
+ /images/pxeboot/*
+ /isolinux/
+ /isolinux/*
+ */*-release*
- */kernel-debug*.rpm
- */kernel-devel*.rpm
- */kernel-doc*.rpm
- */kernel-headers*.rpm
+ */kernel-*.rpm

# Exclude everything else
- *

$ cobbler import --name=centos5.8 --available-as=http://mirrors.kernel.org/centos/5.8/os/x86_64/ --path=rsync://mirrors.kernel.org/mirrors/centos/5.8/os/x86_64 
task started: 2012-04-17_214407_import
task started (id=Media import, time=Tue Apr 17 21:44:07 2012)
Found a redhat compatible signature: CentOS
adding distros
In add_entry(/var/www/cobbler/ks_mirror/centos5.8/images/pxeboot/vmlinuz,/var/www/cobbler/ks_mirror/centos5.8/images/pxeboot/initrd.img)
- Warning : Multiple archs found : ['x86_64', 'i386']
creating new distro: centos5.8-x86_64
creating new profile: centos5.8-x86_64
creating new distro: centos5.8-i386
creating new profile: centos5.8-i386
associating kickstarts
*** TASK COMPLETE ***

$ cobbler profile report --name=centos5.8-x86_64
Name                           : centos5.8-x86_64
TFTP Boot Files                : {}
Comment                        : 
DHCP Tag                       : default
Distribution                   : centos5.8-x86_64
Enable gPXE?                   : 0
Enable PXE Menu?               : 1
Fetchable Files                : {}
Kernel Options                 : {}
Kernel Options (Post Install)  : {}
Kickstart                      : /var/lib/cobbler/kickstarts/sample.ks
Kickstart Metadata             : {}
Management Classes             : []
Management Parameters          : <<inherit>>
Name Servers                   : []
Name Servers Search Path       : []
Owners                         : ['admin']
Parent Profile                 : 
Proxy                          : 
Red Hat Management Key         : <<inherit>>
Red Hat Management Server      : <<inherit>>
Repos                          : []
Server Override                : <<inherit>>
Template Files                 : {}
Virt Auto Boot                 : 1
Virt Bridge                    : br0
Virt CPUs                      : 1
Virt Disk Driver Type          : raw
Virt File Size(GB)             : 5
Virt Path                      : 
Virt RAM (MB)                  : 512
Virt Type                      : qemu

$ find /var/www/cobbler/ks_mirror/centos5.8/ -type f
/var/www/cobbler/ks_mirror/centos5.8/images/pxeboot/vmlinuz
/var/www/cobbler/ks_mirror/centos5.8/images/pxeboot/README
/var/www/cobbler/ks_mirror/centos5.8/images/pxeboot/initrd.img
/var/www/cobbler/ks_mirror/centos5.8/CentOS/kernel-xen-2.6.18-308.el5.x86_64.rpm
/var/www/cobbler/ks_mirror/centos5.8/CentOS/kernel-xen-devel-2.6.18-308.el5.x86_64.rpm
/var/www/cobbler/ks_mirror/centos5.8/CentOS/centos-release-notes-5.8-0.x86_64.rpm
/var/www/cobbler/ks_mirror/centos5.8/CentOS/kernel-2.6.18-308.el5.x86_64.rpm
/var/www/cobbler/ks_mirror/centos5.8/CentOS/centos-release-5-8.el5.centos.x86_64.rpm
/var/www/cobbler/ks_mirror/centos5.8/isolinux/vmlinuz
/var/www/cobbler/ks_mirror/centos5.8/isolinux/isolinux.bin
/var/www/cobbler/ks_mirror/centos5.8/isolinux/options.msg
/var/www/cobbler/ks_mirror/centos5.8/isolinux/rescue.msg
/var/www/cobbler/ks_mirror/centos5.8/isolinux/memtest
/var/www/cobbler/ks_mirror/centos5.8/isolinux/general.msg
/var/www/cobbler/ks_mirror/centos5.8/isolinux/initrd.img
/var/www/cobbler/ks_mirror/centos5.8/isolinux/boot.msg
/var/www/cobbler/ks_mirror/centos5.8/isolinux/splash.lss
/var/www/cobbler/ks_mirror/centos5.8/isolinux/isolinux.cfg
/var/www/cobbler/ks_mirror/centos5.8/isolinux/param.msg

$ du -hs /var/www/cobbler/ks_mirror/centos5.8/
78M	/var/www/cobbler/ks_mirror/centos5.8/