I was able to finally get it working by modifying the CMD file as follows in the PREPARE section:

:PREPARE
set arch=x86_64
set editionid=Professional
set langid=en-US
set build=10240
set...

I downloaded the latest decrypter and retrieved the .ESD from one of my PC's that got the update. When I try to build the ISO for the ESD I get the following:



find: `/i': no medium
find:...