It's been covered plenty of times of late... in particular Steve of TME is coming to vic to tune, there is one workshop that has just had praise for tuning VR4s from one member.......
don't live up to your user name and become public enemy by asking silly questions.
You'll actually need to purchase a full Haltech interceptor system. Or a Vipec system. Then spend heaps getting it tuned as there's no definitions for our cars.
Flashing the ECUs on our cars just cannot be done due to the encyption. Don't pay any attention to the above posts.