another approach on the same yum, you could try replicating daily all rpms, saving time, even on a win box:
# wget -nd --mirror -P. \ http://download.fedora.redhat.com/pub/fedora/linux/core/updates/3/i386
then, move all new files to your linux box (to, say /var/rpms/) and
create your own repository and update with
# createrepo /var/rpms/ # yum update
Why bother with the createrepo? The repodata directory will already be there.
Paul.
