It should be easy to alter to your needs. Keep in mind inheritance is setup here. All ranks receive permissions from the rank below it. This makes adding repeated nodes a lot easier and you can disable inheritance per group as well. I recommend doing all group/node work by hand in file and doing any promotion/user group changes in game or in console using commands.
Sorry to be blunt, but you will have to do all the nodes yourself as I am not going to do a full permissions setup for free.