You can flash the Galant ECU with the 2.0 cable, regardless of 99-03 model years. Though the Galant ECU is flashable, and some will likely use it, it still is a "band-aid" solution once you are 5pd swapped IMHO.
If you want it done properly, 4cyl should simply swap directly to an Evo ECU since it has the Knock Sensor, where as the Galant and Eclipse ECU does not.
The V6 platform simply just swaps over to the Eclipse M/T ECU.
The reason I say to swap to an Evo (4cyl) or Eclipse (V6) Ecu is simply because you have about 30+ wires that are not needed in the harness once you are swapped to the 5spd. Just leaving the bundle of wires, or running a dual ECU setup, or intermediate harness are all what I personally view as a "band-aid" solution...like it or not, it is the truth when it comes down to it.
Doing the wiring and swapping over to the full ECU is pretty easy that I am confident in most of the people here that they can do it themselves...considering what many have been able to do already.
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