Very carefully. Seriously, if you don't add all the setup stuff, you basically don't. You *CAN* use diskpart and dism to apply stuff, but most people have no idea how to do that.
winmain prs Windows 10 build 10240 have october time bomb expire. th1 Windows 10 build 10240.16384 not have! , that is RTM!
The build was sent out to a few PC manufactures I think just so they can make sure everything works as that will become RTM (just build number change to 10400 or whatever). It does have a timebomb likely because its not intended to be used as an RTM but just for testing the bloat on.
I've explained this before, but same build number but different branches aren't the same. They change things in winmain, but it wouldn't be applied (if at all) until the subsequent build. winmain is also an internal build, so only MS people would even have access to it. th1 10240 is likely the RTM sign-off.