Thanks guys. Sorry for the late response. I have to admit my ignorance here, I've only ever run my guitar as an audio track in Cubase, via VST connections. How would I make Play instances audio directly into Cubase (not with VEP but directly on the same computer as the DAW)?
Okay, I don't use Cubase so perhaps I'm the ignorant one here but shouldn't you be able to insert Play into your project from, say an "insert instrument" or "insert softsynth," route a MIDI track to that softsynth instance which should come up in a synth rack menu or something. Right? Normally, you would insert Play or VEPro or VI pro or any other software synthesizer as a softsynth into your project, record/program your tracks through MIDI routed to the softsynth then bounce them to audio tracks.
Do you record your tracks externally perhaps? Like on a mixing consol or something?
What I suggested in my first post is to create a project all by itself dealing with nothing but your symphonic voices tracks. Export those tracks to seperate wave files, on to say the desktop, then import those tracks into another project where you have your VePro/VI Pro, or whatever. Normally, you should be able to just click and drag them into your main project.
It could be that I'm not understanding exactly what you're trying to do but I hope this helps.