I've been using Dimension3D's DSF Toolbox. (From the DAZ store. Wait for a sale if you buy it. Will probably be half off or more this week, for Black Friday.) You don't need to have DAZ Studio installed to use it. It's a standalone program for Windows. Among other things, it turns DSF files into OBJs, where they can be imported into Poser like any other OBJ.

It keeps the material zones, but you'll probably have to apply the textures manually. DS materials are different from Poser materials anyway.

Someone told me DSF Toolbox doesn't work with all hair, but so far it's worked with all the ones I've tried it with. Also works very well with dForce clothing, if you want to use it in the Poser cloth room.