Door hinges are available from us here if you haven't already got one:
http://www.ukapplianceparts.com/laundry_models.asp?search_fd3=Door%20Hinge&search_fd17=wm64p
At the top of the door seal you will see a plastic square - prise that apart with a flat bladed screw driver and remove the metal clamp band. The door seal should just peel away - note you only need to remove a bit of the seal to gain access to the hinge.
When unscrewing the hinge hold on to the bracket at the back of the door otherwise it will fall in to the machine!
Lee, January 2007