Create new install disc with updated packages
I've got a 3 or 4 machines I'd like to install Centos (or some other distro) on, but I'm stuck with slow internet connections. I have some Centos discs, and I would like to install, but somehow create new discs once I've updated one machine. I'm limited to 180 MB a day with satellite, and DSL is not available at the house.
How do I update my one machine (yum, apt, whatever) then create install discs using the updated packages from that one machine? I don't know if it's possible, but it can't hurt to ask, right?