as anticipated, I played a bit with a bunch of utilities and I think I achieved what I wanted, which was: "Launch ET using the Media Center Button of my remote from remote, show it on my second display which is actually my TV and maximize ET Window to full screen"
It works so far even if I need to do more testing. My setup requires:
I use WinLIRC to capture my MCE Remote commands and WinLIRC Helper to translate the Green Button code into a keyboard sequence (I use Ctrl-E to launch Emby Theater). With a simple script of AutoHotKey I execute ET when the "Ctrl-E" hotkey is pressed and by automatically sending just after the shift-Windows-Right hotkeys I move ET Window where I want, as maximized.
Now I should admit using three different utilities for such a simple task is a bit overkill and I would have preferred something simpler, but at the moment is what I have been able to. To be clear, WinLIRC Helper was necessary to me because I really wanted to use the original Media Center Green button to launch ET, and I couldn't find a way for AutoHotKey to recognize it even if I played a lot with the WinLIRC AutoHotKey script in the documentation. Maybe someone smarter can help me out
if you are interested, I've attached the script I'm using (you need to change extension back to ahk). The script launches WinLIRC (WL) and WinLIRC Helper (WLH) simply using two shortcuts saved in the same directory where the script is for convenience and then associate Ctrl-E to an action which runs Emby Theater (again I use a shortcut to the actual executable) and does the magic
The AHK script is executed at windows logon so is always there when I need it.
Everything is very basic and hard coded but hopefully can help someone while we wait for a more robust solution by the Emby team.