After I have tried to shrink a titan black bottom navigation bar. I have found that it is required several steps to do in resizing this bar. So I created a zip file that can be flashed through CWM in order to resize a Nav. bar by half...
Now, I have found those paid apps hidden in mnt/asec. Not sure about if it is encrypted with a device keycode but you may give it a try though. Hope this help.
Well, me too started to love this G Pro over my S4.
Confirmed on JB 4.2, the location is
Copy wallaper to somewhere else and change its extension to wallpaper.jpg and you are done.