Hey there Mythvfx,
Would you mind further explaining what you mean by "combining Ziva Face Trained asset with a RT Solver"?
If I'm understanding your question correctly, you're looking to setup a Face Trainer Asset within Maya or a Game engine using ZivaRT's solver?
If my assumption is correct then an asset that was trained by Ziva's Face Trainer includes a .ZRT file which is used in conjunction with a RT Solver. There's documentation on setting up a Ziva RT solver, which we call "Players", within a Game Engine or Maya.
ZRT Player Documentation
If my assumption is wrong, further explaining your question will help me point you in the right direction! 😄