I don't think it could be much simpler... unplug wires, screw old ones out... torque the new ones in to the proper torque specification - which would be listed in the factory service manual available for download in the sticky at the top of our DIY forum. If you want to get fancy about it, use some compressed air to blow any grit out the spark plug ports after you pull the cables.
Good luck!
Heath
Good luck!
Heath