You will at the very least need a base map and then calibrate the PowerFC for your car and its sensors, and then get a shop to protune it. Most shops won't touch them because they are too old and their tuners don't know how to use them and don't have the connectivity kits and software needed to tune them. At a minimum you will need a tuner with an official Apexi interface (doubt anyone has one, they are $$$$) or a Datalogit box with FC Edit software, or CoPilot software.
i would say you should sell it (theyre worth around $600-$700 with commander) and then get a tune on your stock ECU from Rob. It would be cheaper and youd maintain the benefits of the OEM ECU, like knock correction (which the PowerFC doesnt do)