Look at ur dyno plot, pick the rmp where the car is making about half boost, that will be ur launch staging rpm and initial launch. Then its a case of slip the clutch and nail the throttle when the light goes green. Try it at some traffic lights to get used to the ideal clutch biting/power point, ul know when its right as the car will be hooked up, on boost and rolling hard.
Obviously its a feeling that only u will find out, each car and person will be different.