HI Jon,
If you have a REALLY fast computer, it is possible to move instruments (of course only within the range of the hotspots!) without getting any artefacts. This doesn´t work reliably all the time, as MIR PRO is not designed for this task, we actually thought of seated musicians [:)]
Why don´t you try with the demo license of MIR PRO 24 that you just ordered? The Konzerthaus Foyer could be a good place to start.
Best,
Paul
Paul Kopf Product Manager VSL