Well at the top toolbar of Vienna Ensemble Pro are two icons MIR and MIRx - if MIR is red it means it is auto (or you can click on it and it will be). You then load a VI Pro from the lower left. It will automatically be set up with MIR.
Then you will either see the MIR space, or if not press f6. There you can select the venu and the instrument is there in it. If you look at the upper right you'll see that VI selected the correct settings for the instrument automatically. You can also select "character" a little below which has EQs designed for that particular instrument. Below that is the dry/wet for that instrument alone which you can adjust. That same column if you scroll down has the overall dry/wet offset which is important because it allows you to clarify the sound of the whole venue with dry signal. So you just move that instrument wherever you want it. Also make it bigger or smaller by dragging its handles.