Turn power off! Remove the lid - Two screws at the top back, and slide the lid backwards to get it off the two guides. Lie machine on its back. door uppermost. remove plate below the door - 8 screws (ish) you can now see the motor and guides. The front, with the door in it, is also loose. You can lift it up, just enough to pass the new belt over the drum. You may need a second person to help with this. Put the belt, in place, on the drum. with the free end going on to the motor. The guides just take up the slack. You may need to slacken off the motor (4 screws) to give you more freedom on the belt. Put the screws back.
Before powering on revolve the drum several times, to bed the drum back in to it rotation point in the front cover.
Power it up. This may seam complicated, but it is not. I am no DIYer, but managed this in less than an hour.
Mike Byrne
March 2007