Hi Cyril,
The Appassionata patches are already in the presets. The only instruments that can be picked directly in NOTION are those who have .notion files or put another way, the current selection of instruments that are available for Special Edition. You can load for example Violins I into your score. Then by clicking on the instrument interface, picked from the presets menu that I have provided the appassionata Violins [03 Violin (a20)]. The patches have been loaded in such a way to respond correctly to the NOTION commands. You can use the same approach with other instrument presets that have been provided. For example, one could load Trumpet I then replace that preset with Bass Trumpet or Cornet.
I have six instances of VE-PRO 64 working with NOTION with no problems using a single MacPro. It's not the configuration that was provided with NOTION but my own custom. The only issues I have is that any single-line percussion whose patch uses different keys on the keyboard for different articulations (i.e. snare, bass drum, cymbals, etc.) cannot be mapped if the instrument resides outside of NOTION such as in VE or VE-PRO. This is to due with internal assigned instrument ID's that allows NOTION to know what instrument is loaded. That assignment is lost when you link a staff to an External VST. The solution at the present time is to load those type instruments, many drums and cymbals into NOTION and the rest in VE-PRO.
Hope this helps.