They mean that you can use software to switch the xbox dashboards. In order to copy games, you need to switch what the xbox boots to, if you try to go on xbox live with it switched, your xbox crashes, and sometimes gets nuked.
That table was a lauphing stock and even posted on front pages in most xbox sites. Go here for a better table. X-ecutor seemed to correct it.
http://www.x-ecuter.com/xodus.htm