/playslideshowwithmusic immediately plays a slideshow with music.

"/mcesuperbar://tv?live=true" goes directly to live TV (assuming you have a tuner).

Getting back to our initial example, suppose that you want to bypass the startup animation and go straight to live TV. Here's the how the Target field should read (make sure to leave a space before each switch):

%windir%\ehome\ehshell.exe /nostartupanimation "/mcesuperbar://tv?live=true"