If given enough width, this carousel will show 5 images, 2 on each side of the one in focus. In Site Designer it looks a bit 'off' in that you just see one image sitting too far left. Just preview it, and you will see what it really looks like.
The timing is set to change every 4 seconds. This can be edited in the java script found in the Element pane, Footer Code window. Look for the line:
}, 4000); // every 4 seconds
and change the 4000 to what you prefer.