How to install, see : http:mazda3revolution.com/forums/2014-2016-mazda-3-skyactiv-audio-electronics/122458-aio-all-one-tweaks.html
It is quite easy to do on your PC, the system will then copy the necessary files onto an USB-stick which you connect in your car. The CMU will automatically recognize the files and install them.
Besides the wallpaper, I installed the following tweaks :
- Enable touchscreen while moving.
- Remove disclaimer completely.
- Remove the safety warning from the reverse camera.
- Remove the blank album art frame.
- Install date to statusbar.
- Install speedcam patch.
- Install 1 sec diagnostics menu.
- Disable boot animation.