*"objects able to use smooth polygons..."
*I assume you refer to the ballooning of objects when you enable polygon smoothing in Poser 5 or higher.
That is caused by the way the objects are modeled. Poser 6 and later have a settable threshold for when to smoothe and when not to smoothe, you can find it in the object properties palette.

Well-built Poser figures and props take the smoothing capabilities of Poser into account, and either load with polygon smoothing turned off (for objects with sharp edges), sensible numbers for the smoothing threshold, and, since Poser 7, smoothing groups.
There is no "magic fix". You either fix it by hand (and I suggest saving the fixed object back to the library so you don't have to do it time and again), or you live with it.

By the way, polygon smoothing in Pro is exactly the same as in Poser 7.

The pen is mightier than the sword. But if you literally want to have some impact, use a typewriter

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