I don't know if this is possible or how to do it the right way, but I am setting up a HTPC. The refresh rate auto-changes to 24Hz when Blu-Ray discs are played, I'd like to set a timer for about 20min after the last time "enter" is pushed (starting the movie) to perform a command when the "back" button is pushed (exiting the movie) so that I can reset the refresh rate back to 60Hz on the HTPC. I'd like to just use a flag when enter is hit and start a timer (20min or so), but it is my understanding the timer will disable other commands while running, any thoughts?