[mythtv-theming] Watch Recording Buttons?

[Fred Squires]

Is it possible to add a row of buttons like in the linked example?
http://www.gunaxin.com/wp-content/uploads/2009/08/drawing.png

Basically, I'd like to create a theme with a 3rd buttonlist on the
watch recording screen.
In the above example, with a show on the right selected, you could
press right again and then you'd be able to select an info button, a
menu button, and a related recordings button. They would open the info
menu, the menu menu, and either jump to current series' group or pop
up another screen showing only the recordings of the current series
respectively.

I was just wondering if this was even possible, before I attempted anything.

Fred