very easy, unlock the door with your remote, open the hood, find the switch that tell the car the hood is open (located on right side, beside the power steering reservoir).
cut the wire (it is a one wire switch) and ground that wire to the closest body screw. So the computer will think the hood is open and the anti-theft alarm will stay off. I have done this with an 2003 and a 2004 and I am quite sure it will do the same with an 2006 good lock