[Yum] How to use Yum to create a jailroot/chroot environment

[Villalovos, John L]

Does anyone know how to use Yum to create a jailroot/chroot environment?

I tried:

[root at linuxjohn4 fc3]# yum --installroot=/usr/jailroot/fc3/ install gcc
Repository updates-released already added, not adding again
Repository base already added, not adding again
Setting up Install Process
Setting up Repo:  base
http://linuxjohn.intel.com/pub/fedora/linux/core/Null/i386/os/repodata/r
epomd.xml: [Errno 4] IOError: HTTP Error 404: Not Found
Trying other mirror.
Cannot open/read repomd.xml file for repository: base
failure: repodata/repomd.xml from base: [Errno 256] No more mirrors to
try.

Has anyone done this?  Basically I would like to create a jailroot of
Fedora Core 3.

It seems like using Yum to create a jailroot would be a natural
extension of its capabilities but I am not quite sure how to do it.

Thanks,
John