2b) Rightclick into one of WED's views, Add -> Add Model, select a model (f.i. copy one from the templates folder into your project folder). Select the model, click the Behaviour tab. Click the button next to the empty Action field and select player_walk. If the list is empty, go to File -> Map Properties -> Script and select your "sample code" from above. Then repeat the step and assign player_walk. Now save and build your level. Then click Run (that's the 9th button in WED's toolbar) and walk around your level.