Advise on Installing a disconnected Redhat Satellite?

I'm going to be honest, I've been trying to upgrade our Redhat Satellite from v5.4 to v5.6 for about 6 months now and running into a number of stumbling blocks. I currently one run one RH Satellite server that runs in disconnected mode. I'm told that typically in a DoD environment, there are two RH Satellite servers, one that talks to the Internet, which gets the latest and greatest content and then that is moved to the disconnected RH Satellite and updates are pushed from there.

Last week, after downloading all of the Base and Child Channels isos (around 400 GB of data), I ran the wrong command after copying over files that were having issues and deleted the whole OS. So now I have to start over.

I'm wondering if anyone can advise on how to set this up smoothly, so I don't get further behind on patches for the servers that I manage.

thanks