Should be something similar to the installation of Aristois. You can screenshot the files you get in hunuzi and I can probably figure it out from there.
Steps to Install
You must run the regular 1.11.2 version of minecraft first before you install Aristois (or whatever version the hunuzi client is for)
Open the file you just downloaded from MPGH
Extract the contents of the file you downloaded
Double click on the extracted file (it should be a .jar file)
A dialog box will pop up saying "Install Aristois". Click Ok
Another dialog box will pop up saying "Aristois was successfully installed, open your Minecraft launcher and select "release Aristois_1.11.2"".
Aristois is no successfully installed.