Double Dark Side! Diesel & 8P
Ok I'll try and describe it the best I can without a photo.
I'm assuming you Know what and where the airbox is on the right of the engine bay? Well the hose that comes directly out of the air box will have a connector plugged into the top of it. Just unplug this and the car will run off of default data on the ECU instead of using the MAF reading.
This won't do any harm at all to the car. If your car feels a lot smoother with the MAF unplugged then it's probably had it.