I'm not sure what you mean by swinging your tool bars vertically - in the example you provided, they're already vertical.  And without knowing what your P7 setup looks like, I'm not sure what to tell you on that point.

As for your Preview window, at the top-right corner of every window in Poser 8, there's a tiny little button you can click on and choose how the window behaves:

If you click on that button for the Preview window, check Floating, and then un-check Drag-Floating Enabled, you can customize the dimension of window without risk of it re-docking.