How to convert to EXT4 Filesystem in Samsung Galaxy SL?

1. First make a Nandroid Backup via CWM.
2. Download the Ext4 convertor script here.
3. Copy it to the root of the External Sd Card of the Phone.
4. Go to Recovery.
5. Flash the Ext4 Script. (Pl. Do not reboot the phone after this)
6. Restore the Nandroid backup immediately.
7. Reboot and enjoy Ext4.