Here is step-by-step video tutorial on how to flash Symbian Custom Firmware on Nokia Using JAF tool, video after break.
1- How To Flash BB5/Nokia Phones With JAF
YouTube Link: - http://www.youtube.com/watch?v=wYdZoAYG2nA
2- How To Flash Nokia 5800/Symbian Devices/BB5 Using JAF – Custom Firmware Flashing!
YouTube Link: - http://www.youtube.com/watch?v=gnwmjCSraUI
Get the JAF Tool Here: – http://goo.gl/HR1LJ