The Vaistech unit is what allows you to see the MD function. It is in the software but not seen unless you have a device that access it like the Vaistech. If you were to unplug the CD changer, you would no longer see CD. The Vaistech unit fools the unit into thinking it has a MD plugged in to it.
You will see exactly what everyone else sees on the nav display, channels, names, etc...