I wouldn't advise it.
The Runtime folder not only contains content, it also contains settings, There is no guarantee that P7 settings will be valid in Poser Pro.

If it's just the content you need, it's better to link the P7 rontime to Poser Pro as an external runtime.

One exception to the cut/copy/paste situation: it can be useful to copy the <Poser 7 Runtime folder>:Python:poserScripts folder to the :Python:poserScripts folder. That is, if you have installed extra Python scripts in P7 that you want to have in Poser Pro too.

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

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