i had someone else ask about this, too. i have some tips on how to modify my files to do exactly what you are asking. see here:
instructions:
http://www.mympxplayer.org/viewtopic.php?t=874
here is a guy who added the telbook:
http://www.mympxplayer.org/viewtopic.php?t=743&start=15
hope that helps,
doon