How to edit .OBB file
For edit .obb files in android you need:
- ASTRO file manager from google play (free)
1. Find file with .obb end by astro
2. Rename .obb to .zip
3. Open with astro. You can edit files inside, add some mods, update etc.
4. When you end editing files just rename it back from .zip to .obb and close.
Tested and work in jelly bean 4.1.2, but i saw there are problems for android 4.2 in " android/obb" with files...
#NOTE for point 2.
Don't end with ".rar", use only ".zip"