Like I said its not really a "launch control" its more of a brake boosting/assisted launch (mk1 that is, not sure how mk2 is). You should build a PSI or two of boost. If you are really good you could two step it and use your ebrake to help hold the car. With FWD it may = Tire spin.

AND LIKE A SAID, with your trans situation, I HIGHLY do not recommend it other then for reasons of doing a quick torque converter test.