Greetings and welcome to JA! I will do my very best to assist you with your problem.
Yes, the pcm will have to be re flashed for the car to run.Security settings as well as the VIN and millage will be reprogrammed as well.
Hope this helps!
No problem at all. Here is the info I have for it. Now,I am not saying that you can't give it a shot and see what happens, but I expect there to be some issues if you do. I totally understand about the mileage as well. If it was just that I don't think it would be a concern either.