Hi Carlo, in answer to your questions:
1. The pre-made detail 'texture' maps (ie. if you're not using the one created from a photo) are available in 'Create' -> 'Texture'.
There is currently no modulation slider but this can be added if there is demand for it.
2. Yes, this is still available in the paid version. It is not currently available for trial as part of the demo version.
We do not have a tutorial video for it but you can review the instructions here:
If you'd like to try a run-through, please email an FG file to '
sa...@facegen.com' requesting a Mixamo Fuse export for evaluation.
Best wishes,