There are 3 screws at the front of the dryer about 4 inches up from the bottom - they are hard to see as they are at an angle towrds the floor. Remove the 3 screws and pull the door towards you from the bottom - the lugs at the top will then disengage.
Remove the innner door by removing 2 hex head screws on each side.
You now have access to the drum and you can change the belt.
After fitting the belt, I find it easier to fit the belt on the tensioner pulley from the rear access dorr.
Good luck,
Ron Frend, October 2006