To launch a nuclear missile in Area 51, first collect the hover upgrade in the second hanger (the one on the immediate right if you are player one). You can do a 50-50 a 180 or car (board) slide. Slowly drive off it to land on the pipes, going into the ground to grind across them. You should be looking across to another one. Go up the ramp and turn left, then turn left again onto an oil silo. Right after you go between them, turn left and you will see a ramp. You will pass between two pipes that go into the ground. To perform a grind in the Alaskan Pipeline, head to head towards the water when you first start the level.
Go to the options and turn the damage on high and the difficulty on low. You will get 10 points for 1 symbol during game play. To get 10 salvage points instead of 5, go to options and set the difficulty to 92 and bullet symbol to high. To get triple salvage points, destroy your opponents with a special weapon. This may be repeated as many times as needed, unless the tower is destroyed. Collect the weapons including specials and radar jammers. You will then be shot into the air and dropped. You will be taken up on to the tower and a booster rocket will be placed on the back of your vehicle.
Wait until the lights above are green before driving in. Go to the tower in the middle of the Launch Site level and approach to the tunnel that does not go through. To disable codes, enter NO_CODE or any invalid password three consecutive times.