Um there isn't really any trick to it. Just start taking off what you can to so you can get to the stuff underneath. Bag and tag everything. Take lots of pictures as you go.
To get the engine out, I recommend stripping it all down to the frame and the engine. Then lay it on it's side unbolt the engine, and then work the frame off of the engine. It is much easier the get the frame on and off the engine than to get the engine on and off the frame.