To add the model to your scene append them choosing the group you want from the file. The sunshades models are in the layer 1, the lounger model is in layer 2. The sunshade models are not moving with different aperture positions. Though, all the objects are independent, so you can position them to the aperture you want and then run the cloth simulation again. The lounger armature have hidden bones. If you want to make changes to the armature setup, you have to unhide the bones layer. Subdivision surface modifiers, bevel modifiers and solidify modifiers are not applied, so you can edit the models easily.