go to -
www.goldenevo.com and download the definitions for your specific car.
copy the downloaded file to
C:\Program Files\OpenECU\EcuFlashBeta\rommetadata\mitsubishi\ evo
then open ecuflash with tactrix connected and car on 2nd click. Ecu tab- Read ecu
-that will read the tune thats currently on the car. u can click file save as to save that
then file open- locate the new you want to load. and under ecu tab - write to ecu
you dont need to revert to stock tune you can flash straight to the tune you want.