Remote controlling a Macbook Pro with the lid down?
There is probably not going to be an offical way to do this but, what you want to do is disable the laptop from sleeping when the lid is closed. And adujust the energy saver settings in System Preferences to never let the Computer Sleep. Then use your existing VPN  tunnel as expected.

See Is there any way to set a MacBook Pro to not sleep when you close the lid? for suggestions on ways to stop your Mac Book Pro from sleeping when the lid is closed.


  The top rated suggestion was downloading InsomniaX to disable sleep mode.