This is a thread on how to unpack and repack the system.img.dat file of your Android Rom,to see its content.
Starting from Android 5.x (Lollipop) Custom roms are not compressed like on previous android versions. Earlier all Files were inside the /system folder.And we were able to see all the system files
The problem started in >=5.0 versions because rom size increased and it was necessary to highly compress them again.
You Must Have Following Files Installed in your PC
1. Java SDK = Click here to download java
2. Python 2.xxx= Click here to download Python
How to decompress /Repack these files? Its Sipmle !!
Follow the Instructions Below To do that.
Download the Android Unpack Repack adithyan25.rar from here
Or you can download it from attachments
Run The File And Follow The Instructions As on screen.
Special Thanks @xpirt
If you are a good Programmer You Can follow his method .View His Method here
If you Have any doubts or Enquired post in the Comment section