Get a rom tune. I'm not trying to be a dick but you're kinda clueless and a programmable ecu is not something you need.
enthalpy rom tunes are the way to go super fast service and easy and normally a pretty stout safe tune. You can also go to martins shop (enthalpy) and he will tune your car on the dyno while you wait. Im going very soon i will post up results soon. Promised 290-310 whp with only a t28 safely!!
right now 480 hoping to grab some 550 or 740 before i hit the dyno. but 480s will do 300-320