Credit By Yg Honey
How to install and Flash Khmer Unicode
  1. Make Sure your phone on stock rom ICS 4.0.4
  2. Need Download stock firmware JB Leak :
  3. Need Kies in Your Computer and Must Download Odin 
  4. Boot in to download mode 
  5. Connect USB to computer 
  6. Open odin click PDA find file Stock JB that you download and exract it 
  7. Click Start wait untill it done 
  8. Drop Out Battery and put in then reboot into Recovery full wipe
  9. Then you will get JB on your galaxy S III
  10. Root your phone and flash font khmer