Just works as if there's no .L modifier. This was the very first IR mapping I tried. Just wanted to get the Hijack menu up by using the Tuner button on the Rio remote.

Not sure why that particular one doesn't work but try this instead to accomplish the same effect:

20DF07=20df12.L

Though I'm not sure why you would to bother when you can just hold down the OK Button to get the Hijack menu from the Rio Remote. I guess pressing a button is a little easier than holding one?