If there hadn't been so many men, a way could of been to use a "playmove" when the
moron is standing in front of an entrance ( like, if ya tried a "StandWalkF" or alike ).
That'll force them to walk - even through wall if that was your want.
Another way - best when they're so many - is to simply teleport the groups.
Make a tiny cutscene, or just put the player outta sight from the other troopers,
and then setpos them all to some place inside the castleVania.
Don't think it'll get much better then that, m8 :-\