Maybe it would be better to make a figure from the props?

Seriously, what you try to do may be possible with Poser 8 with it's Dependent Parameters, but it could be tricky Could you add some details and tell us what exactly do you try to do? I assume it would be easier to find a solution then. 

A ship in port is safe; but that is not what ships are built for.
Sail out to sea and do new things.
-"Amazing Grace" Hopper

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