After download use a root explorer and move it to system app. U will get fc, reboot. Then using root explorer find systemui in system app folder and fix permission there rw r r should be permissions. Not sure if if fixing them in cmw would work or not, won't hurt to try. As for battery, try flashing mazouts kernel on this that should fix your problem. All this rom is is themed for the most part so its probably the kernel thats hurting your battery life
Sent from my LG-P999 using xda app-developers app
Sent from my LG-P999 using xda app-developers app