They will work as they are simply props and can be placed manually wherever you want them.
However, they will not be influenced by wind like the SpeedTrees in iClone, so you would need to animate them somehow. I'm not familiar with the product, so I can't say much more about it.
EDIT: Actually, I'm not even sure that they can be animated. But if you just want a static tree, you would want to get an OBJ version and import it through 3DXchange.
Easiest would be if you could find an iClone tree in Total Plants that looks very similar to a fig tree.
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