I have been checking through the forums to see what is the best way to upgrade to a 2001-2002 Operating system, or PCM. It seems in a few threads I was reading you could flash the 01-02 operating systems on a 1999 PCM. I want to verfify if this is possilbe before I attempt to kill my PCM. I realize that none of my 1999 tune will tranfer, thats OK. I do have EFI Live commercial. I want to upgrade operating systems to run a SD COS with a 2 bar map. Thanks in advance!