Stage R80 upgrades

[RCordova]

We have a number of R80.30 firewalls that we need to upgrade to R80.40 and apply a certain JHF in addition. All of these have too be done during a change window. In order to reduce the amount of time that is required (downloading the OS and JHF during the window) is there a way to upload the R80.40 OS and JHF prior to the change window and do the upgrade from the CLI?

Thanks