You know, lights out management is a wonderful thing and there's never been any kind of evidence that these features do anything but offer functionality that Intel's customers asked for.
No, that's just the CPU µcode. IME/AMT are part of the BIOS/EFI images, which is a whopping 16 MiB for my current motherboard.
The current CPU microcode download appears to be 0.81 MB compressed for every single Intel CPU since the Pentium 4.