Matt, thanks. I am testing and doing how you say but my question remain:

1- I load my song or I write chords from scratch, whatever.
2- assign a Real Track style, this time RT Bossa Brasil Quartet ...
3- I force the RT piano to MIDI.
4- The piano part still as bossa style playing via MIDI in my VSTi. The rest of RT remain unaffected
...all right.

Q: Now, how may I assign a MIDI style to only the piano part (now MIDI) without affecting the others RT instruments style?