xeox

You can use a WSUS, and/or you can try it with WuInstall, it is very effective especially in combination with psexec. You just write a script that executes WuInstall /install on every machine, which gets all the updates currently available (or you can select update with the /match or /severity options) see WuInstall

You can try to do this in a command line script with WuInstall, with the /download option. Usually puts the downloads into the Windows\SoftwareDistribution\Download directory. From there, you can copy them on every new machine and install them, for example with wuInstall /install. Maybe in a future version it will also be possible to specify a certain download directory.