I had problem with reflashing an STI 01 with my open port 2.0(the flash fails an the car wont start) then i put my open port 1.2 in the car and recover the ecu.I think it was because my computer was on xp SP2 instead of SP3.
Now i want to reflash an WRX 09 but it 'll be the first time i reflash a car without flash block.
Does someone did it ? it is as simple as : put the plug in the car an press reflash or there is something i must know?