The 2 things you should never do is place a motherboard on a metal surfice or an anti-static bag. Only the insides of the bag are actually anti-static. By placing it on a metal surface you running the risk of something touching the board and to echo the poster above me, when that happens it's normally bad news. Good thing that's a P4 and not a 1155 or 1366 because if it was I'd go to america and give you a clip round the ear for being foolish.
Go find a cardboard box and cut off one side. Place the board on the cardboard strip, jobs a gooden.