In order to be able to integrate your 3D models into our software you will need to follow these instructions, as the 3D models need to have certain specs in order to work in FaceRig http://steamcommunity.com/app/274920/discussions/6/485622866436709756/.
You can add your models in FaceRig, but bear in mind the Steam version is for home-use, non commercial purposes.
If you plan to use FaceRig commercially you will need FaceRig Studio.
If you want, we can start a collaboration and add your 3D models as a DLC to our software which will be for free (in this scenario our artists can rig the models to be integrated into FaceRig)
And example of a free DLC that we have is this one http://store.steampowered.com/app/321700/ called Starbound free avatars (from the game Starbound).
If you are interested in our proposal please write on our email address info[at]facerig[dot]com.