No long list of steps just use the full installers for your engine 4 upgrade. Go to the store and find the order for your v4 upgrade and follow the link to the download. Just pick the full installer for the platform you are using and download it. Unpack the .zip file - make sure it is in a new empty folder. Then run the setup.exe program and you are done.
I seem to recall that the CMBS install does not include the latest patch. If that game does not show a version of 2.1 then you can find one additional patch to that game here: https://www.battlefront.com/patches