Tim,
I just bought a LG LD450, and I started testing your LG template. I've trying to do things like turn down the volume and/or mute the tv, but I'm not seeing the commands change the status on the TV. I believe I have correctly added the template to my MD which connected to my TV, but I was thinking that there might be something missing. Please let me know if you need for me to submit a screenshot for you.
Thanks,
Ernesto