Not by Command line Im afraid.
http://www.dom3minions.com/docs/CommandLine.txt
It can, as you say, be done my map commands. A script could run thru the entire province count adding 1 to each very quickly.
http://www.dom3minions.com/docs/map_qref.txt
Ive never tested to see if that will ignore the games usual limits
But if its going to be one VP for each Province then isnt that the same as basing it on the score.html?
http://game.dom3minions.com/games/Fo...ip/scores.html