Hi Sunny,
The door it's self has a cover on the frount that can be removed (carfully) with a flat head screw driver. Once this is done unscrew all screws and replace.
If the hinge attached to the machine is riveted on then you'll need to drill out the rivets first. Do this by using a drill bit slightly thiner than the shaft of the rivet (you should have some in with the relacement hinge). You'll also need to hire/buy a rivet gun to pop the new rivets in if you don't have one.
Al B, October 2004