Part I - The Demise of the Zombie Pirate Le Chuck
Talk to Wally and take the pirate literature from him. When he breaks down and starts crying, pick his hook that has fallen on the floor. Take the ramrod off the wall and use this with Wally's hook. Now use the cannon and destroy all the pirate rowing boats out side the ship (aim using the mouse). Lean out of the cannon hole and look outside. Use the ramrod + hook to get the skeleton arm. Now talk to Murray for an infinite amount of time. Don't ask why - you just have too. Go back inside the ship and use the sword from the arm on the cannon restraint rope. Fire the cannon one last time.
In the hold, look for the small
brown bag and pick it up Once you have the diamond ring, use it on the
port hole to get out of the ship.