In fact, you do not need to open the mpq. As far as I know, only color and hotkeys can be changed there. Now you have hotkeys. Do you want a different color? Keep in mind that each unit needs to be painted, and this is not a joke. Only after that you download this color and use it.
mpq is already open to everyone, you just don’t know how to work with it.
I did not mention the creator of the program. This person is known on the server under the nickname Mistral.