You will need to acces the WCM module. It should have a section for "Replace pcm" it will give you step by step procedures of transfering the skim and then the vin to the new pcm. Then you can flash or update the pcm. You will need the 4 digit pin to access the skim transfer. On some Chrysler pcm replacements I have had to flash the pcm 1st. then transfer skim then vin. I am not sure why it is backwards on some models. To obtain a 4 digit pin you will need NASFT access or ask the selling dealership were the pcm was purchased. They can get it for you, if your parts guy works with you.