this app will help Replace system files by just single click you can..
****This is free version with ads, buy pro to support my work..:)****
****Your device must be rooted.****
How to use?
Open this app and click on "Create" button, this will create new folder name "pawn" in primary memory of your device.
Now copy your modded SystemUI.apk or framework-res.apk , or both into "pawn" folder.
Now goto "PR System Patcher" app and choose what you want to replace.
for example :- if you have chosen "SystemUI.apk" then in next window some options will come, select desired options and click on "Replace+reboot" button
and done.
And this will backup your old files, and replace new files.
You can restore these files anytime if you are not happy with current setting. :)
more info will be found on xdablogs.com