Unplug the dryer,remove the top panel,remove the control panel,usually a couple of screws on the top right and left side,when you get the control panel off there are like 4 screws on the top front panel then open the door and remove 2 more screws,disconnect door switch.go here this will help you out i'm trying to go by memory and it's harder to remember how to do it,when i'm in front of it i can pull it apart no problem but this should help you out.
http://www.youtube.com/watch?v=RvbJn61d9hQ