As above theyre awesome ebcs, mine took about an hour to install and a good few hours to setup, but its worth it!
There are 6-7 wires that need (or can be) spliced into the ecu loom, there are 2 for ground, one for live, one for rpm pickup (can also be used for injector duty cycle instead), one for speed, one 1 for throttle position (which isnt compatible on the starlet so dont worry about that). Just use electrical taps to run into them without cutting them in half.
Its got its own boost (map) sensor that needs to be located as if you were installing an electronic boost gauge, just find a suitable boost source (i.e, bov or throttle body hoses). All mine are at the throttle body including my fcon map sensor.
Then of course you have the boost solenoid, that needs to be located as close to the turbo as safely possible to help with response. Just hook that up between the hose that goes between the turbo and the actuator (cut the hose in half). Make sure the hoses are secure!
All the wiring in the engine bay (from the map sensor and solenoid) can be fed through a hole in the firewall on the drivers side. Its a bit fiddly as some of the block connectors might have to go through, but its not an impossible task!
Hope that gives you a hand mate, pm me if you need any help with it or setting the damn thing up, it wont be easy at first. :haha: