well yes..
i never tryed with the npcs, but as for the mons there is a pattern to follow, i can only say the usually a new mob starts at 360 and as a pattern, first must be standing in all directions, then walking, then attacking and then dieing, etc etc but its not that simply anyway...
to be really sure u should study a little bit the other mon files, try looking through the standard ones, which are nearly all execpt the one with shinsu, evilcentiped, zumataurus, does are a little messed up and might cause u some trouble in understanding the pattern!