I have a feeling KLM investigated this and found most ordinary people could land an airliner. I don't know the details but I assume that meant they could take instructions from the ground to configure the computers to do the approach and landing. As long as someone knows how to press the transmit button, you're safe.
I wouldn't worry anyway as I cannot recall a double pilot failure, and many flights have more pilots on them than you can shake a joystick at. The chances of you making it into the driving seat is zilch.
