Chipping an ecu is just using fuel and ignition curves that were programmed for someone elses engine. No matter what parts they used in their motors, even if you copied their motor part for part, your motor would not perform the same. Maybe close, but the metallurgical properties of the materials processed to make your motor parts, the breaking in procedures, the condition under which their motor was tuned to run, will all differ from your motor. Just invest in some tuning, cars aren't merely a manipulation of variables, which is basically what you are doing by getting a prefabbed program. Just sink some extra cash into some form of tuning, be it hondata/motec/electromotive/vafc/etc.
Motec is insane stuff.