In level 8 of the truck missions, you must deliver highly illegal goods to Las Venturas. Enable the "Cars float away" and "All cars have nitro" codes before doing this mission. Make sure that the goods must be delivered to the Rockshore area, which is in southeast of Las Venturas. If it is in any another area, destroy the truck until you get Rockshore the delivery destination. Get out of the depot and go directly to the train track. Take a right. Do not use the nitrous yet. You will go through the tunnel . Beware of the train. As soon as you reach Unity Station, many police cars will try to collide and they will float away. Your problem is the helicopters. As soon as the helicopters try to fire bullets, enable the nitrous and drive quickly until you reach the tunnel. When you reach Rockshore, turn right and drive into the red marker.