I'm about to create a new CentOS 3 VM for testing, since we still have a bunch of deployed machines running that OS. (Don't yell at me about using old OSes. These machines won't get "un-deployed" until they fall over dead of natural causes. Until the last one dies, we need test and build VMs around to service them.) I have the CentOS 3.9 *.iso files plus a local cache of RPMs against 3.9 that is probably incomplete relative to the vault[*]. It seems wasteful to install the last published version of the OS, then scp over my local update RPMs, freshen from those, *then* check with the vault for yet more updates. What I'm hoping for is some way to get a "CentOS 3.10", being 3.9 with the vault updates directory contents merged in. Is there a straightforward way to do that, or is schlepping around folders full of RPMs actually the best way to go? [*] http://vault.centos.org/3.9/updates/i386/RPMS/