Error 1784 using me_util.py

[Bohosul01]

I think that Windows has changed and now HECI isn't handled the way it used to be, because when I execute me_util.py using Python 2.7 with admin rights, I get the following error:

WindowsError: [Error 1784] The supplied user buffer is not valid for the requested operation

[mbehensky]

I was able to get it to run, and print some info about my bios .bin file by using the 32 bit version of python2.7, instead of the 64 bit version. The README is wrong; to unpack an existing binary file use
me_unpack not me_util.
If you already have a binary file you don't need to run as administrator.

[Bohosul01]

It worked when I tried the 32-bit version of Python 2.7.

This is not related to the issue, but I want to ask a pair of things:

1. How can I know what commands is my intel ME able to receive? I suppose it depends on my ME firmware, so what modules/files do I have to look in order to get the information about the commands (group number / cmd number / payload data).
   Can I get this info using me_extract.py? How?

2. I must execute the script this way: "python me_util.py 《group》《cmd》《payload》". Let's say I want to send the HMR FPO Enable MKHI command (just an example, I know it isn't posible unless in manufacturing mode): the binary data for this command is a sequence of 4 hexadecimal numbers as you can see here in page 20.
   Do I have to execute me_util.py 4 times using those hexadecimal numbers as 《payload》 in the correct order? If not, how am I supposed to send the mentioned command?