If you have a dpc.exe and a ds.exe, download both. The dpc.exe file often contains everything you need to make the model work with Poser, and the ds.exe file adds the bits that you need to make it 100% compatible with Daz Studio. Poser content works with Daz Studio, except for materials (and lights, and probably a few other bits and bobs), and the ds.exe file will include the bits to make it work better on DS.
That’s not to say all content has specific bits for DS, some just have the Poser parts and either look fine in DS anyway, or could use some tweaking in the Surfaces tab.
Hope that helps.