This is a simple (root) app I made to let you change your CSC on a number of firmwares across multiple Samsung devices. Simply push the button, and you will be sent to the list of CSC codes, where you can choose whatever CSC. Credits go to Perka, who thought of this and posted the method in this thread. I merely made an app to do it.
THIS WILL WIPE YOUR PHONE, LIKE PERFORMING A FACTORY RESET. MAKE BACKUPS OF WHATEVER YOU DO NOT WANT TO LOSE.
The files on your SD Card will not be touched.
A slightly older version :P.
The app is attached, have fun .