Black_Dog, Elements has an organizer. I've never loaded it, but it's gone one.

The advantage of Manual w/ Auto ISO over Av w/ Auto ISO is ensuring your shutter speed is hand holdable. I have no idea what a T4i will do when it can pick both shutter speed and ISO. It may try to keep the shutter speed high, and raise the ISO to compensate. Since we know shutter speed can be low, we can force that with Manual mode, helping to ensure a lower ISO and less noise.