Ok, First you will need to go San Fierro.Go straight to the the Easter Basin Docks (where you do the import/export submission). As soon as you get there, there will be a gate with a security stand. To the left of this, there will be a motorcycle called the NRG-500. Hop on and a mission will start. Wait 10 seconds for it to end. Ok now go to the big Bridge that leads into Bone County (not the red one, the one next to it). Now head to the Police Impound that's right next to it. When you get there a cop will start shooting you. Kill him, but dont get off your bike. Now head inside the impound while on your NRG-500 and more cops will shoot you but there will only be a few guarding the place. Head all the way to the bottom floor.Now this might not work the first time, but you will see that there are cars parked. Only the cars have been ''rearranged'' There will be cars that seem unusual. Examples: Cars stacked on top of eachother; weird vehicles like Dumper truck and Dozer. Its a cool trick if you like causing mayhem in the streets