The one I have is old and not supported by the ELM software, lol. I doubt that I would do it, but I am just humouring the idea of the work involved in changing the PCM over to one that supports the software so I can configure it...
It might be easier/ better to leave the PCM and change the ELM software
If you change your PCM,(AKA ECU ) you would need to recode it to your injectors, your PCM is probably coded to your BCU (body control unit) which is coded to your key(s) and ;locks, recoding the BCU/ key(s) is normally a dealer job (and realatively expensive)
On top of that, the PCM you aquire is probably identical to the one you have (so still not supported by the elm software/ and then stlll needing coded to the injectors etc) or, incompatible (won't work) with the other components on the car
So in a nutshell - forget it, not worth the hassle - better to leave the PCM/ car electronics alone and try another plug in solution/ code reader etc