Hi Shadow_Fyre,
P3dO is not using Prpc anymore at least in P8.
Using Prpc is an option in P3dO, in Options dialog, Plugins tab uncheck "Use with Poser Remote Procedure Call daemon" and close any Prpc/PoserPythonPrpc script.

With this new version you don't have anything to set in Poser to open a file from P3dO, Poser has to be opened that's all.
You'll see it is much more convenient to use than with Prpc.

btw As you pointed out, you must have the lastest Poser plugins pack (available on my website) to use this with P8

Yarp
www.senosoft.com

Yarp - author of P3DO Organizer for Poser