LDW-811S => SOHW-832 possible?

I heard that a 451S could be “changed” in a 832S using a modified firmware. Is the same thing possible with a 811S ? If yes, where can I find this firmware ? In case of an error in the manipulation, what is the program able to come back to the previous firmware ?

Thanks to the one wou will help me.

No, not possible.