How do I mix Note Performer with other VST sounds

I have tried to use Noteperformer as my primary sound, but it does not have a good electric piano sound, which I would prefer. I have the EW library, and I can access it, but I can’t get NotePerformer and EW to “share” the project… what am I missing here?

I can have note performer as the playback template for the project and then manually add a new VST instrument (in play mode) and route your electric piano to it.

You might also be able to set up a Playback Template that loads the EW library only for keyboard sounds and then fills in the rest with NP. The Dorico Mixer / NP Mixer setup will be a little quirky though. I did an illustration for someone with the same question about combining BBCSO Strings.