(bug?)Movie clip contains an object with a z value will not edit the object in place, it goes into a seperate window.

Question

When a movie clip contains an object with a z value, I can not edit the object in place, it goes into a seperate window.
This changes the vanishing point relative to the movieclip instead of the stage (allong with everything else).
This makes it very hard to keep track of where the movieclips will end up when actualy playing the animation.

Answer 1

I should have explained my situation a little better. I have a machine that's made up of a number of parts, some of them are fairly large and some are quite small. When a user clicks on a part, I want to center that part on the screen and then move whole machine toward the screen until the selected part either fills the screen (for the larger parts) or the part bumps up against the front clip plane (for the smaller parts).
I didn't think of checking for a collision with the ViewPlatform's TG, thanks for mentioning that. I wasn't sure how the ViewPlatform's location relates to the clipping plane, but I'll dig into it. I'm still learning how the ViewingPlatform, the image plate, and the clipping planes all relate to each other.