There has been a few questions on this, mine wasn't answered so here is how I did it.
Remove side panels (4 screws), remove top (2 screws), Remover cooling Fan cover (8) and brace (4). Now remove the Cooling Fan by taking off the pinch clamp and then remove the two screws behind it. Undo the screw securing the back top left. Lay machine on left side and undo the remaining screew to secure the back (4 at the back, 1 top right). Remove the back being careful not to disconnect or break the wires - you won't be able to move it far! slide the new belt over the back of the motor. unplug the red, black and wite wires from the motor, slide belt under the motor and replace the wires. unscrew the capacitor/condenser and slip the belt past so that it is free from the wires. unscrew front mounting plate and slip belt under. refit front mounting plate and capacitor nut. Belt is now in place! Now reposition the back stretching the belt around the drumput. Now put it back together in reverse order.
John, January 2009