You can manage a prototype system by using chroot. For example, you can update a package this way:
chroot /srv/stateless/protosystems/DemoSystem yum update evolution exit
This will update the evolution package, using the RPM database within the protosystem.
Once you're happy with the state of a prototype system, run stateless-snapshooter as above.
This will update the LDAP directory. Client machines check the LDAP directory every hour to see what they should be running. If an update is detected, a caching client will automatically rsync the new file tree into its reserve partitions.
Reboot the client machine after an update has occurred in order to use the new snapshot.
 Unfortunately this is not a perfect system, since although the chroot environment has access to the appropriate file hierarchy, it does not have access to the correct set of processes. We are working on a better solution to this.