First of all, welcome to the Dark Side.
MUAHAHAHAHA!
j/k

Anyway, the first thing you'll want to do is to link your Poser runtimes to D|S.  Go to Edit>Preferences and click on "Directories".  Select Poser Content Directories from the Dropdown menu, and hit search (well, if you have a lot of runtimes like me.  If you only have a few, and know exactly where they are, you can navigate to them manually by clicking "Add")  Once you've done that, navigate to the Poser directory where V4 is, and load her.  (If you installed her directly to the D|S runtime, it will be in a runtime of its' own called "content".  NOT the "Studio" runtime that will be at the top of the library.  I liken it to the "Downloads" runtime that's auto-installed in Poser since V5.)
And, from there, you should be golden!  The D|S material presets will be in the Studio runtime under the "People" heading.  :)

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Knowledge is knowing a tomato is a fruit. Wisdom is not putting it into a fruit salad.