I need help(jeep ecu problem)

I HAVE GOT A PROBLEM OF ECU BURNT,I FOUND A USED ONE AND IS AVAILABLE,MY QUESTION IS IT IMPORTANT TO DO SYCHRONIZATION OR IAM SUPPOSE TO TAKE DCM,ECU,AND REMOTE KEY FROM(ANOTHERCAR) ONE ACCIDENT CAR,OR ONLY USED ECU WILL WORK TO ANOTHER CAR.........(PLEASE HELP ME..............IF IAM POSTING THIS ON THE WRONH PLACE PLEASE HELP ME RELOCATE...ILL BE GLAD IF YOU REPLY ME THROUGH PRIVATE MESSAGE OR EMAIL ([email protected]) THANKS IN ADVANCE)