Just got the 622. If I would switch to single mode, what happens to TV2? Are you still able to watch there? Also, my installer told me it's a big deal to switch between modes and it takes like 5 minutes. My book says just hit the button. Being technically challenged like I am, I am afraid to try it for fear I mess something up, but from the dish book it seems to me there is no difference in recording abilities betweek the two modes. Is that right?