display 3D image via model tab.

Hi I am trying to display an image (the turbine from the windmill example) in my vizualisation. I Have tried editing the vms file from the example, but cannot get it to display in my vizualization. I just need a static wind turbine to indicate wind farm location. Nothing fancy. How does this work? Do i need a vms file? the (rudimentary) example implies i do not, but i can only load vms file through the model tab. Any help is appreciated. thnx, Bert