If from Stock Based Custom ROM
1. Flash back to stock via ODIN
2. Root your devices
3. Flash CWM Recovery
4. Mount data, system, cache.
5. Flash EXT4 Formatter
5. Flash bieltv3 kernel
6. go to advanced, and reboot recovery
7. Wipe Data
8. Wipe Cache Partitions
9. Wipe Dalvik Cache
10. Format system
12. Format cache
13. Format data
14. Mount system for 2 times, ( your screen will show "Unmounted" even first one
already unmounted, but still you need to mount system for 2 times )
15. Mount Data
16. Mount cache
17. Install Zip from SD Card
18. Reboot
If from CM7 Based ROM
1. Wipe Data
2. Wipe Cache Partitions
3. Wipe Dalvik Cache
4. Format system
5. Format cache
6. Format data
7. Mount system for 2 times, ( your screen will show "Unmounted" first already u
nmounted, but still you need to mount system for 2 times )
8. Mount Data
9. Mount cache
10. Install Zip from SD Card
11. Reboot