The confusing part is WHY isnt his ISO the same as the full RTM? well, it installs the same file, although he used the rest of the files ( everything but the Wim or Vhd, essentially), from a previous version. These files are essentially just the boot and the installer and are not going to be part of the installed version of windows. It was a clever way to use the RTM VHD package he got and made an ISO which installed the real RTM on your computer. The package on both Wzor and the other RTM are the same.
So dear friend orbit30 carefully combined said WIM files together, leavingnothing out, and made it work with the install/setup files of the DVD.He also made adjustments as to only modifying the few windows 7 filesand registry settings that involve activation.