How do you change the door latch on a Kenmore HE2 Gas Dryer? Do I have to unscrew the back of the door to acess the part?

I believe that for most of those dryers, you have to take the front off. The drum will probably have to be tilted out of the way and put back on when you replace the front. The door latch should be readily visible.

Here's a link to the sears parts direct page. If you enter your complete model number, you can see some diagrams of it.

Searching Model #HE2 | 51 Suggested Models | SearsPartsDirect.com (http://www.searspartsdirect.com/partsdirect/getModel!retrieve.pd?modelNumber=HE2)