This is what works for me:
From a complete stop, while the car is in gear, place your FiST in 'Sport Mode' by pressing the 'ESC' button. This will partially turn off your Traction Control (TC). TC does not need to be turned fully off when using Launch Control (LC). Once you've placed your FiST in 'Sport Mode', push and hold down on your Cruise Control (CC) 'On' button. While pressing down on the CC 'On' button, press and hold your gas pedal to the floor like you mean it. Your FiST will rev to 4k RPM. While holding in on the gas, simultaneously release the CC 'On' button and the clutch. Then hold on to your butt! Be prepared for a quick shift!