Then simply use
#start <province nbr> :
"By creating at least one start location for each player, every player will start at one of these locations."
Simply mark 2 or 4 provinces as starting provinces and you're done.
Dunno why everyone thinks he has to mark every other province as nostart ... . Unless you want
really random starting provinces, but some corner provinces or those with only 1 neighbour taken from the list of possible draws.