suspended objects
You have to change the "z" of x,y,z postions. Set the Z to 150 ft. Like in Bad Ace Obstacle Course....those planes that look like they are sitting on top the platforms are really just suspended at the correct height. Remember, as in "The Matrix" there is no spoon....lol.
One other thing, while adding objects to an existing photo field, I have had my objects move on me everytime I save them. That, and how the views doesn't mate with the ground correctly in chase or cockpit, is why I started making them from scratch.