If you've collected all the achievements, but one in the game Hydro Thunder Hurricane, this tutorial might help. One of the most difficult achievement to collect is the Special Delivery achievement. To unlock this you'll need to find all 80 crates in the game.
With this next tutorial, you'll be finding all of the crates on the Tsunami Bowl level of the game. They're not too difficult to find in this one, but you will need some good timing. So good luck and enjoy!