Tolriq
Maybe you can add to the call plugin an option to send a message instead of pause the movie, but with info on the movie, so if someone is calling he will receive a message saying "sorry, i can't answer right now I'm watching xxxxx, the movie will end in xx min (time)"
Also maybe an option to ask when the movie is over if you want to send reminder to anyone that call during the movie
Last thing, I found a way to do everything that I wanted, control the amp volume when changing the volume in xbmc, turn the light when you start watch movie and many more, I will give more info for anyone interested when I finish, I'm doing this with eventghost and xbmc plugin, this is working great, so now I can do anything from yatse automatically